Dr. Consolacion  Y. Ragasa

Dr. Consolacion Y. Ragasa

Professor
De La Salle University, Philippines


Highest Degree
Ph.D. in Chemistry from University of the Philippines, Philippines

Share this Profile

Area of Interest:

Biomedical Sciences
100%
Natural Compounds
62%
Phytochemistry
90%
Pharmaceutical Chemistry
75%
Natural Medicine
55%

Selected Publications

  1. Ragasa, C.Y., V. Ebajo Jr., M.M.D.L. Reyes and C.C. Shen, 2015. Chemical constituents of Eucalyptus deglupta. Der Pharma Chemica, 7: 224-229.

  2. Ragasa, C.Y., V. Ebajo Jr., M.M.D.L. Reyes and C.C. Shen, 2015. A flavone from Eucalyptus deglupta. Res. J. Pharm. Chem. Biol. Sci., Vol. 6. .

  3. Ragasa, C.Y., T. Bauca, S. Chua, K.B. Cornelio and C.C. Shen, 2015. Chemical constituents of Synsephalum dulcificum. Chem. Nat. Compounds, Vol. 51. .

  4. Ragasa, C.Y., O.B. Torres, L.B. Bernardo, E.H. Mandia, M.J. Don and C.C. Shen, 2015. Chemical constituents of Palaquium luzoniense. Chem. Nat. Compounds, 51: 181-182.
    CrossRef  |  Direct Link  |  

  5. Ragasa, C.Y., O.B. Torres, J.M.P. Gutierrez, H.P.B.C. Kristiansen and C.C. Shen, 2015. Triterpenes and acylglycerols from Canarium ovatum. J. Applied Pharm. Sci., Vol. 5. .

  6. Ragasa, C.Y., M.C.S. Tan, M.G. Noel and C.C. Shen, 2015. Isothiocyanates and sterols from Raphanus sativus. Der Pharmacia Lettre, Vol. 7. .

  7. Ragasa, C.Y., K.F. Lim, L.O. Bernardo, M.V. Arceta, E.H. Mandia and C.C. Shen, 2015. Chemical constituents of Weinmannia luzoniensis. Chem. Nat. Compounds, 51: 183-184.
    CrossRef  |  Direct Link  |  

  8. Ragasa, C.Y., J.P.M. Austria, A.F. Subosa, O.B. Torres and C.C. Shen, 2015. Chemical constituents of Amaranthus viridis. Chem. Nat. Compounds, 51: 146-147.
    CrossRef  |  Direct Link  |  

  9. Ragasa, C.Y., J. Caro and C.C. Shen, 2015. Chemical constituents of Artocarpus ovatus blanco. Der Pharma Chemica, 7: 178-182.
    Direct Link  |  

  10. Ragasa, C.Y., A.P.U. Chua, E.H. Mandia, L.O. Bernardo and C.C. Shen, 2015. Chemical constituents of Cardamine flexuosa. Der Pharma Chemica, 7: 100-105.

  11. Ragasa, C Y., E.C. Cabrera, O.B. Torres, A.I. Buluran, D.L. Espineli, D.D. Raga and C.C. Shen, 2015. Chemical constituents and bioactivities of Glinus oppositifolius. Pharmacogn. Res., 7: 138-147.
    CrossRef  |  Direct Link  |  

  12. Ebajo, Jr. V., C.C. Shen and C.Y. Ragasa, 2015. Terpenoids and sterols from Hoya multiflora blume. J. Applied Pharm. Sci., Vol. 5. .

  13. Biona, K., C.C. Shen and C.Y. Ragasa, 2015. Chemical constituents of Talinum triangulare. Res. J. Pharm. Biol. Chem. Sci., 6: 167-171.

  14. Tsai, P.W., K.A. de Castro-Cruz, C.C. Shen and C.Y. Ragasa, 2014. Chemical constituents of Ficus triangularis. Der Pharmanica Lettre, 6: 130-133.

  15. Ragasa, C.Y., V.A.S. Ng, V. Ebajo Jr., M.M.D.L. Reyes, E.H. Mandia and C.C. Shen, 2014. Chemical constituents of Wrightia pubescens (R.Br.). Der Pharmanica Lettre, 6: 14-19.
    Direct Link  |  

  16. Ragasa, C.Y., V.A.S. Ng, V. Ebajo Jr., D. Fortin, M.M.D.L. Reyes and C.C. Shen, 2014. Triterpenes from Shorea negrosensis. Der Pharmcia Lettre, 6: 453-458.
    Direct Link  |  

  17. Ragasa, C.Y., V.A.S. Ng, M.M.D.L. Reyes, E.H. Mandia, G.G. Oyong and C.C. Shen, 2014. Chemical constituents and cytotoxicity of the leaves of Dysoxylum gaudichaudianum (A. Juss.) Miq. Der Pharma Chemica, 6: 182-187.
    Direct Link  |  

  18. Ragasa, C.Y., V.A.S. Ng, M.M.D.L. Reyes, E.H. Mandia and C.C. Shen, 2014. Triterpenes and a coumarin derivative from Kibatalia gitingensis (Elm.) woodson. Der Pharma Chemica, 6: 360-364.

  19. Ragasa, C.Y., V.A.S. Ng, M.M.D.L. Reyes, E.H. Mandia and C.C. Shen, 2014. Chemical constituents of Pipturus arborescens (Link) C.B. Rob. Der Pharmanica Lettre, 6: 35-42.
    Direct Link  |  

  20. Ragasa, C.Y., V. Ebajo Jr., V.A.S. Ng, M.M.D.L. Reyes and C.C. Shen, 2014. Chemical constituents of Strongylodon macrobotrys. Der Pharma Chemica, 6: 366-373.
    Direct Link  |  

  21. Ragasa, C.Y., R.F. Galian, M. Arenal, V. Tan and C.C. Shen, 2014. Chemical constituents of Samanea saman. Res. J. Pharm. Biol. Chem. Sci., 5: 1501-1507.

  22. Ragasa, C.Y., R.F. Galian, E. Lagueux and C.C. Shen, 2014. Chemical constituents of the fruit of Persea Americana. Res. J. Pharm. Biol. Chem. Sci., 5: 984-987.

  23. Ragasa, C.Y., R.F. Galian and C.C. Shen, 2014. Chemical constituents of Annona muricata. Der Pharma Chemica, 6: 382-387.
    Direct Link  |  

  24. Ragasa, C.Y., O.B. Torres, J.V.V. Tongco, R.A. Razal and C.C. Shen, 2014. Chemical constituents of Petersianthus quadrialatus Merr. Res. J. Pharm. Biol. Chem. Sci., 5: 181-186.

  25. Ragasa, C.Y., O.B. Torres, E.H. Mandia and C.C. Shen, 2014. Chemical constituents of Terminalia microcarpa. Der Pharmnica Lettre, 6: 439-442.

  26. Ragasa, C.Y., O.B. Torres, C.C. Shen, M.K.E.G. Lachica and A.B. Sulit et al., 2014. Triterpenes from the leaves of Syzygium polycephalum, S. cumini and S. samarangense. Chem. Nat. Compounds, 50: 942-944.
    CrossRef  |  Direct Link  |  

  27. Ragasa, C.Y., O.B. Torres, C.C. Shen, L.B. Bernardo, E.H. Mandia, K. de Castro-Cruz and P.W. Tsai, 2014. Chemical constituents of Ficus linearifolia and Ficus triangularis. Chem. Nat. Compounds, 50: 172-174.
    CrossRef  |  Direct Link  |  

  28. Ragasa, C.Y., O. Torres, E. Marasigan and C.C. Shen, 2014. Sterols and triglyceride from Garcinia binucao. Der Pharma Chemica, 6: 229-232.

  29. Ragasa, C.Y., O. Cuevas, E. Mandia and C.C. Shen, 2014. Chemical constituents of Ficus ampelas. Res. J. Pharm. Biol. Chem. Sci., 5: 355-359.

  30. Ragasa, C.Y., M. Aguilar, L. Theresa, V.A.S. Ng and M.L.G. Bugayong et al., 2014. Terpenoids and sterol from Aphanamixis polystachya. J. Chem. Pharm. Res., 6: 65-68.
    Direct Link  |  

  31. Ragasa, C.Y., K. Biona and C.C. Shen, 2014. Chemical constituents of Sechium edule (Jacq.) Swartz. Der Pharma Chem., 6: 251-255.
    Direct Link  |  

  32. Ragasa, C.Y., J.L. Caro, L.G. Lirio and C.C. Shen, 2014. Chemical constituents of Coix lacryma-jobi. Res. J. Pharm. Biol. Chem. Sci., 5: 344-348.

  33. Ragasa, C.Y., J.L. Caro and C.C. Shen, 2014. Triterpenes and sterol from Artocarpus ovatus. J. Applied Pharm. Sci., 4: 7-11.
    Direct Link  |  

  34. Ragasa, C.Y., F.C. Franco Jr., D.D. Raga and C.C. Shen, 2014. Chemical constituents of Syzygium samarangense. Der Pharma Chemica, 6: 256-260.
    Direct Link  |  

  35. Ragasa, C.Y., D.R. Fortin and C.C. Shen, 2014. Chemical constituents of Shorea contorta. J. Chem. Pharm. Res., 6: 1243-1246.
    Direct Link  |  

  36. Ragasa, C.Y., D.L. Espineli, D.D. Raga and C.C. Shen, 2014. Chemical constituents of Sphaeranthus africanus. J. Chem. Pharm. Res., 6: 2197-2200.
    Direct Link  |  

  37. Ragasa, C.Y., D.L. Espineli and C.C. Shen, 2014. Cytotoxic triterpene from Barringtonia asiatica. Pharm. Chem. J., 48: 529-533.
    CrossRef  |  Direct Link  |  

  38. Ragasa, C.Y., D. Fortin and C.C. Shen, 2014. Chemical constituents of Arenga tremula. Res. J. Pharm. Biol. Chem. Sci., 5: 1479-1485.

  39. Ragasa, C.Y., A.P.U. Chua and C.C. Shen, 2014. Chemical constituents of Schizostachyum lumampao. J. Chem. Pharm. Res., 6: 738-742.
    Direct Link  |  

  40. Ragasa, C.Y., A.I. Buluran, E.H. Mandia and C.C. Shen, 2014. Chemical constituents of Cayratia trifolia. Der Pharma Chemica, 6: 418-422.

  41. Ragasa, C.Y., A.B. Alimboyoguen and C.C. Shen, 2014. Chemical constituents of Ficus nota. Der Pharma Chemica, 6: 98-101.

  42. Ragasa, C.Y. and J. de Jesus, 2014. Porphyrins and polyprenols from Macaranga tanarius. Res. J. Pharm. Biol. Chem. Sci., 5: 701-708.

  43. Ragasa , C.Y., O.B. Torres, D.D. Raga, E.H. Mandia, M.J. Don and C.C. Shen, 2014. New triterpenes from the bark of Canarium asperum. Der Pharmanica Lettre, 6: 290-294.

  44. Raga, D.D., M.L.S. Diezmos, A.C.C. Orantia, M.J.A. Lo and J.C.P. Evangelista et al., 2014. Analgesic triterpenes from Ardisia cf. Elliptica (Subgenus: Tinus) (Myrsinaceae). Der Pharma Chemica, 6: 153-161.
    Direct Link  |  

  45. Raga, D.D., A.A. Herrera, A.B. Alimboyoguen, C.C. Shen and C.Y. Ragasa, 2014. Effects of triterpenes from Ardisia cf. elliptica (subgenus Tinus) and sterols from Ardisia pyramidalis Cav Pers on Artemia salina and Danio rerio toxicity and caudal fin regeneration. J. Chem. Pharm. Res., 6: 1014-1022.

  46. Espineli, D.L., E.M.G. Agoo, R.S. del Fierro, C.C. Shen and C.Y. Ragasa, 2014. Cytotoxic and antimicrobial compounds from Cinnamomum cebuense Kosterm.(Lauraceae). Pharm. Chem. J., 48: 598-602.
    CrossRef  |  Direct Link  |  

  47. Espineli, D.L., E.M.G. Agoo, C.C. Shen and C.Y. Ragasa, 2014. Chemical constituents of Cinnamomum trichophyllum. Chem. Nat. Compounds, 50: 389-390.
    CrossRef  |  Direct Link  |  

  48. Ebajo, Jr. V.D., C.C. Shen and C.Y. Ragasa, 2014. Triterpenes and sterol from Hoya mindorensis. Der Pharma Chemica, 6: 321-325.
    Direct Link  |  

  49. Alimboyoguen, A.B., K.A. de Castro-Cruz, C.C. Shen, W.T. Li and C.Y. Ragasa, 2014. Chemical constituents of the bark of Aleurites moluccana L. willd. J. Chem. Pharm. Res., 6: 1318-1320.
    Direct Link  |  

  50. Alimboyoguen, A.B., K. de Castro-Cruz, C.C. Shen and C.Y. Ragasa, 2014. Chemical constituents of Anacolosa frutescens. Res. J. Pharm. Biol. Chem. Sci., 5: 1189-1191.
    Direct Link  |  

  51. Tsai, P.W., K. de Castro-Cruz, C.C. Shen and C.Y. Ragasa, 2013. Chemical constituents of Artocarpus camansi. Pharm. J., 5: 80-82.
    CrossRef  |  

  52. Ragasa, C.Y., V.A.S. Ng, O.B. Torres, N.S.Y. Sevilla and K.V.M. Uy et al., 2013. Sterols, triglycerides and essential fatty acid constituents of Brassica oleracea varieties, Brassica juncea and Raphanus sativus. J. Chem. Pharm. Res., 5: 1237-1243.

  53. Ragasa, C.Y., V.A.S. Ng and C.C. Shen, 2013. Triterpenes from Ficus nervosa. J. Chem. Pharm. Res., 5: 1070-1073.

  54. Ragasa, C.Y., O.B. Torres, L.B. Bernardo, E.H. Mandia, M.J. Don and C.C. Shen, 2013. Glabretal-type triterpenoids from Dysoxylum mollissimum. Phytochem. Lett., 6: 514-518.
    CrossRef  |  

  55. Ragasa, C.Y., O.B. Torres, J.V.V. Tongco, R.A. Razal and C.C. Shen, 2013. Resorcinols from Myristica philippensis Lam. J. Chem. Pharm. Res., 5: 614-616.

  56. Ragasa, C.Y., O.B. Torres, G. Soriano and C.C. Shen, 2013. Sterols and triterpenes from the fruit of Annona muricata Linn. Silliman J., 54: 107-113.

  57. Ragasa, C.Y., G.S. Lorena, E.H. Mandia, D.D. Raga and C.C. Shen, 2013. Chemical constituents of Abrus precatorius. Am. J. Essential Oils Nat. Prod., 1: 7-10.

  58. Ragasa, C.Y., F. Lim, D.D. Raga and C.C. Shen, 2013. Hypoglycemic potential of triterpenes from Alstonia scholaris. Pharm. Chem. J., 47: 54-57.
    CrossRef  |  

  59. Ragasa, C.Y., D.L. Espineli, E.M.G. Agoo and C.C. Shen, 2013. Chemical constituents of Cinnamomum griffithii. Chem. Nat. Comp., 49: 127-128.
    CrossRef  |  

  60. Ragasa, C.Y., D.L. Espineli, E.M. Agoo and R.S. del Fierro, 2013. Chemical constituents of Cinnamomum cebuense. Chinese J. Nat. Med., 11: 264-268.
    CrossRef  |  

  61. Ragasa, C.Y., D.L. Espineli, E.M. Agoo and C.C. Shen, 2013. Chemical constituents of Cinnamomum rupestre and Cinnamomum nanophyllum. Chem. Nat. Comp., 49: 757-758.
    CrossRef  |  

  62. Ragasa, C.Y., D.L. Espineli, D.D. Raga, A.A. Herrera and C.C. Shen, 2013. Terpenoids from Ardisia squamulosa. Chem. Nat. Comp., 49: 388-389.
    CrossRef  |  

  63. Ragasa, C.Y. and K.B. Cornelio, 2013. Triterpenes from Euphorbia hirta and their cytotoxicity. Chin. J. Nat. Med., 11: 528-533.
    CrossRef  |  Direct Link  |  

  64. Ragasa, C.Y. and A.B. Alimboyoguen, 2013. Long chain 4-hydroxycinnamate esters from Allamanda neriifolia Hook. Am. J. Essential oils Nat. Prod., 1: 104-107.
    Direct Link  |  

  65. Ragasa, C.Y. and A.B. Alimboyoguen, 2013. Long chain 4-hydroxy cinnamate esters from Allamanda neriifolia Hook. Am. J. Essential Oils Nat. Prod., 1: 50-53.

  66. Raga, D.D., A.A. Herrera, D. Espineli, C.C. Shen and C.Y. Ragasa, 2013. Triterpenes from Ardisia squamulosa C. Presl (Myrsinaceae) limit angiogenesis and the expression of von willebrand factor in duck chorioallantoic membrane. J. Chem. Pharm. Res., 5: 230-239.

  67. Raga, D.D., A.A. Herrera and C.Y. Ragasa, 2013. Angio-suppressive triterpenoids from Ardisia cf. elliptica (subgenus Tinus) on duck (Anas platyrynchos L.) chorioallantoic membrane. Chinese J. Nat. Med., 11: 128-138.
    CrossRef  |  

  68. Raga, D.D., A. Herrera, C.C. Shen and C.Y. Ragasa, 2013. Triterpenes from Ardisia cf. elliptica (subgenus Tinus) limit vascular density and promote von Willebrand factor expression on duck chorioallantoic membrane. Pharm. Chem. J., 47: 44-49.
    CrossRef  |  

  69. Espineli, D.L., E.M.G. Agoo, C.C. Shen and C.Y. Ragasa, 2013. Chemical constituents of Cinnamomum iners. Chem. Nat. Compounds, 49: 932-933.
    CrossRef  |  Direct Link  |  

  70. Espineli, D.L., E.M. Agoo, C.C. Shen and C.Y. Ragasa, 2013. Chemical constituents of Cinnamomum utile. Chem. Nat. Comp., 49: 769-770.
    CrossRef  |  

  71. Tsai, P.W., K. de Castro-Cruz, C.C. Shen and C.Y. Ragasa, 2012. Chemical constituents of Ficus odorata. Pharm. Chem. J., 46: 225-227.
    CrossRef  |  

  72. Tsai, P.W., K. de Castro-Cruz, C.C. Shen and C.Y. Ragasa, 2012. Chemical constituents of Broussonetia luzonicus. Pharm. J., 4: 1-4.
    CrossRef  |  

  73. Ragasa, C.Y., R.M. Levida, M.J. Don and C.C. Shen, 2012. Cytotoxic isothiocyanates from Moringa oleifera Lam seeds. Philippine Sci. Lett., 5: 46-52.
    Direct Link  |  

  74. Ragasa, C.Y., O.B. Torres, C.C. Shen and J.D. Jacinto, 2012. Chemical constituents of Aglaia loheri. Pharm. J., 4: 29-31.
    CrossRef  |  

  75. Ragasa, C.Y., G. Soriano, O. Torres, M.J. Don and C.C. Shen, 2012. Acetogenins from Annona muricata. Pharm. J., 4: 32-37.

  76. Ragasa, C.Y., D.L. Espineli, E.H. Mandia, M.J. Don and C.C. Shen, 2012. A new triterpene from Glinus oppositifolius. Chinese J. Nat. Med., 10: 284-286.
    CrossRef  |  

  77. Ragasa, C.Y., D.L. Espineli, E.H. Mandia, D.D. Raga, M.J. Don and C.C. Shen, 2012. A new triterpene from Atalantia retusa. Zeitschrift fur Naturforschung B, 67b: 426-432.

  78. Ragasa, C.Y., D.L. Espineli and C.C. Shen, 2012. A new triterpene from Barringtonia asiatica. Nat. Prod. Res., 26: 1869-1875.
    Direct Link  |  

  79. Padla, E.P., L.T. Solis, C.C. Shen, R.M. Levida and C.Y. Ragasa, 2012. Antimicrobial isothiocyanates from Moringa oleifera Lam. Zeitschrift fur Naturforschung C., 67c: 557-564.

  80. Padla, E.P., L.T. Solis and C.Y. Ragasa, 2012. Antibacterial and antifungal properties of ent-kaurenoic acid from Smallanthus sonchifolius. Chinese J. Nat. Med., 10: 408-414.
    CrossRef  |  

  81. Del Fierro, R.S., Q.M.A. Maquilang, R.A.S. Sanjorjo, M.D. Tradio, C.C. Shen and C.Y. Ragasa, 2012. Secondary metabolites from Cinnamomum cebuense. J. Medi. Plants Res., 6: 2146-2149.

  82. Ramos, G.B., C.L. Arguelles, A.A. Herrera, C.Y. Ragasa, 2011. Screening for potential anti-angiogenic property utilizing avian embryo's chorioallantoic membranes (CAMs): II. Garlic (Allium sativum L.) Oil. Asia Life Sci., 20: 13-23.
    Direct Link  |  

  83. Ragasa. C.Y. and L.A.A. Rufino, 2011. Antimicrobial flavonoid fro Hibiscus rosa-sinensisL. Manila J. Sci., 7: 12-18.
    Direct Link  |  

  84. Ragasa, C.Y., L.M. Labaclado and J.A. Rideout, 2011. Triterpenes and sterol from Pouteria campechiana. Manila J. Sci., 6: 1-7.
    Direct Link  |  

  85. Ragasa, C.Y., D.L. Espineli and C.C. Shen, 2011. New triterpenes from Barringtonia asiatica. Chem. Pharm. Bull., 59: 778-782.
    Direct Link  |  

  86. Ragasa, C.Y., A.B. Alimboyoguen, R.S. del Fierro, C.C. Shen and D.D. Raga, 2011. Hypoglycemic effects of tea extracts and sterols from Momordica charantia. J. Na. Remed., 11: 44-53.
    Direct Link  |  

  87. Ragasa, C.Y. amd J.G. Hofilena, 2011. Antimicrobial coumarin derivative from Delonix regia. . Manila J. Sci., 7: 7-11.
    Direct Link  |  

  88. Raga, D.D., R. Espiritu, C.C. Shen and C.Y. Ragasa, 2011. A bioactive sesquiterpene from Bixa orellana. J. Nat. Med., 65: 206-211.
    CrossRef  |  

  89. Raga, D.D., C.L. Cheng, K.C. Lee, W.Z. Olaziman and V.J. De Guzman et al., 2011. Bioactivities of triterpenes and a sterol from Syzygium samarangense. Zeitschrift Fur Naturforschung C, 66: 235-244.
    Direct Link  |  

  90. Raga, D.D., A.B. Alimboyoguen, C.C. Shen and C.Y. Ragasa, 2011. Triterpenoids and an anti-angiogenic sterol from Ardisia pyramidalis Cav. Pers. Philippine Agric. Sci., 94: 103-110.
    Direct Link  |  

  91. Jacinto, S.D., E.A.C. Chun, A.S. Montuno, C.C. Shen, D.L. Espineli and C.Y. Ragasa, 2011. Cytotoxic cardenolide and sterols from Calotropis gigantean. Nat. Prod. Commun., 6: 803-806.
    Direct Link  |  

  92. Ragasa, C.Y., P.W. Tsai, C. Galvez and C.C. Shen, 2010. New carvotanacetone derivatives from Sphaeranthus africanus. Planta Med., 76: 146-151.
    CrossRef  |  PubMed  |  

  93. Ragasa, C.Y., C.J.J. Crisostomo, K.D.C. Garcia and C.C. Shen, 2010. Antimicrobial xanthones from Garcinia mangostana L. Philippine Scie., 47: 63-75.

  94. Ragasa, C.Y., A.B. Alimboyoguen and J.A. Rideout, 2010. An antimicrobial triterpene from Shorea guiso. Kimika, 23: 50-54.
    Direct Link  |  

  95. Raga, D.D., A.B. Alimboyoguen, R.S. del Fierro and C.Y. Ragasa, 2010. Hypoglycemic effects of tea extracts and ent-kaurenoic acid from Smallanthus sonchifolius. Nat. Prod. Res., 24: 1771-1782.
    CrossRef  |  PubMed  |  

  96. Ragasa, C.Y., P.W. Tsai and C.C. Shen, 2009. Terpenoids and sterols from endemic and endangered Philippine trees,Ficus pseudopalma and Ficus ulmifolia. Philippine J. Sci., 138: 205-209.
    Direct Link  |  

  97. Ragasa, C.Y., P.W. Tsai and C.C. Shen, 2009. Antimicrobial terpenoids from Erigeron sumatrensis,. NCPR. Res. J., 10: 27-32.
    Direct Link  |  

  98. Ragasa, C.Y., M.R.A. Puno, J.M.A.P. Sengson, C.C, Shen, J.A. Rideout and D.D. Raga, 2009. Bioactive triterpenes from Diospyros blancoi. Nat. Prod. Res., 23: 1252-1258.
    CrossRef  |  PubMed  |  

  99. Ragasa, C.Y., M.M. Tepora, D.L. Espineli, E. Mandia and J.A. Rideout, 2009. Chromomoric acid derivatives from Tectona philippinensis. J. Nat. Prod., 71: 701-705.
    CrossRef  |  PubMed  |  Direct Link  |  

  100. Ragasa, C.Y., M.M. Tepora and J.A. Rideout, 2009. Antimicrobial activities of sterols from Pycnarrhena manillensis. Chem. Res. Commun., 23: 31-34.
    Direct Link  |  

  101. Ragasa, C.Y., M.J. Apuada and J.A. Rideout, 2009. Terpenoids from Taraxacum officinale. NRCP Res. J., 10: 17-26.
    Direct Link  |  

  102. Ragasa, C.Y., A.B. Alimboyoguen and C.C. Shen, 2009. Antimicrobial terpenoids from Elephantopus mollis. NRCP Res. J., 10: 33-38.
    Direct Link  |  

  103. Ragasa, C.Y., A.B. Alimboyoguen and C.C. Shen, 2009. Antimicrobial triterpenes from Dillenia philippinensis. Philippine Sci., 46: 78-87.
    Direct Link  |  

  104. Ragasa. C.Y., J.P. de Jesus, M.J. Apuada and J.A. Rideout, 2008. A new sesquiterpene from Artemisia vulgaris. J. Na. Med., 62: 461-463.
    CrossRef  |  PubMed  |  Direct Link  |  

  105. Ragasa. C.Y., A.B. Alimboyoguen, S. Urban and D.D. Raga, 2008. A bioactive diterpene from Smallanthus sonchifolius. Nat. Prod. Re., 22: 814-819.
    CrossRef  |  PubMed  |  

  106. Ragasa. C.Y., A.B. Alimboyoguen, S. Urban and D.D. Raga, 2008. A bioactive diterpene from Smallanthus sonchifolius. Nat. Prod. Commun., 3: 1663-1666.
    Direct Link  |  

  107. Ragasa, C.Y., M.C. Lapina, J.J. Lee, E.H. Mandia and J.A. Rideout, 2008. Secondary metabolites from Tectona philippinensis. Nat. Prod. Res. Part A, 22: 820-824.
    CrossRef  |  Direct Link  |  

  108. Ragasa, C.Y., J. Wong and J.A. Rideout, 2008. Monoterpene glycoside and flavonoids from Blumea lacera. J. Nat. Med., 61: 474-475.
    CrossRef  |  

  109. Ragasa, C.Y., H.K.P. Ha, M. Hasika P.D. Gaspillo, J.B. Maridable and J.A. Rideout, 2008. Antimicrobial and cytotoxic terpenoids from Cymbopogon citrates Stapf. Philippine Sci., 45: 111-122.
    Direct Link  |  

  110. Ragasa, C.Y., A.B. Alimboyoguen and S. Urban, 2008. Structure elucidation of a diterpene from Smallanthus sonchifoliusi by NMR Spectroscopy. Res. J., 225: 57-59.

  111. Ragasa, C.Y., A. de los Santos and J.A. Rideout, 2008. An antimicrobial and cytotoxic labdane diterpene from Andrographis paniculata. Chem. Res. Commun., 22: 44-48.
    Direct Link  |  

  112. Janairo, J.R.O., G.C. Janairo, C.Y., Ragasa and B.F. Bowden, 2008. A marine verticillane diterpenoid from Cespitularia erecta. Nat. Prod. Res., 22: 48-52.
    CrossRef  |  PubMed  |  Direct Link  |  

  113. Ragasa, C.Y., M.M. Tepora and J.A. Rideout, 2007. Terpenoids from Tithonia diversifolia. J. Res. Sci. Comput. Eng., 4: 1-7.
    Direct Link  |  

  114. Ragasa, C.Y., L.E.N. Pimenta and J.A. , Rideout, 2007. Iridoids from Gardenia jasminoides. Nat. Prod. Res., 21: 1078-1084.
    CrossRef  |  PubMed  |  Direct Link  |  

  115. Ragasa, C.Y., D.L. Espineli and J.A. Rideout, 2007. Triterpenes from Emilia sonchifolia. Res. J., 21: 23-26.
    Direct Link  |  

  116. Ragasa, C.Y., A.T. Martinez, J.E.Y. Chua and J.A. Rideout, 2007. A triterpene from Musa errans. Philippine J. Sci., 136: 167-171.
    Direct Link  |  

  117. Ragasa, C.Y., A.B., Alimboyoguen and J.A. Rideout, 2007. A triterpene from Rosa sp. J. Res. Sci. Comput. Eng., 4: 1-5.
    Direct Link  |  

  118. Janairo, J.R.O., G.C. Janairo, C.Y. Ragasa, 2007. A new fatty acid ester of a dolabellane diterpene from Clavularia sp. J. Res. Sci. Comput. Eng., 4: 51-59.

  119. Janairo, J.R.O., G.C. Janairo, C.Y. Ragasa and B.F. Bowden, 2007. New xenicanes from Xenia viridis. Nat. Prod. Res., 21: 1067-1072.
    CrossRef  |  PubMed  |  Direct Link  |  

  120. Ragasa, C.Y., P. Labrador and J.A. Rideout, 2006. Antimicrobial terpenoids from Lansium domesticum. Philippine Agric. Sci., 89: 101-105.
    Direct Link  |  

  121. Ragasa, C.Y., M.M. Tepora and J.A. Rideout, 2006. An antimicrobial germacranolide from Michelia champaca. CvSU Res. J., 20: 13-15.

  122. Ragasa, C.Y., J.E. Sia and J.A. Rideout, 2006. Antimicrobial flavonoid from Citrus microcarpa. CvSU Res. J., 20: 16-19.
    Direct Link  |  

  123. Ragasa, C.Y., R.D. de Luna, W.C. Cruz and J.A. Rideout, 2005. Monoterpenelactones from the seeds of Nephelium lappaceum. J. Nat. Prod., 68: 1394-1396.
    CrossRef  |  

  124. Ragasa, C.Y., R.D. De Luna and J.G. Hofilena, 2005. Antimicrobial terpenoids from Pterocarpus indicus. Nat. Prod. Res., 19: 305-309.
    CrossRef  |  PubMed  |  

  125. Ragasa, C.Y., M. Laguardia and J. Rideout, 2005. Antimicrobial sesquiterpenoids and diarylheptanoid from Curcuma domestica. ACGC Chem. Res. Commun., 18: 21-24.
    Direct Link  |  

  126. Ragasa, C.Y., L.M.A. Navaja, L.E.N. Pimenta and J.A. Rideout, 2005. Terpenoids and sterol from Pteridium aquilinum and Bryophyllum pinnatum. CvSU Res. J., 19: 44-49.
    Direct Link  |  

  127. Ragasa, C.Y., J.G. Hofilena, A.L.K.C. Co and J. Rideout, 2005. Antifungal diacetylglycerols from Malachra fasciata and Pithecolobium dulce. ACGC Chem. Res. Commun., 19: 1-5.
    Direct Link  |  

  128. Ragasa, C.Y., H.T. Ngo and J.A. Rideout, 2005. Terpenoids and sterols from Lagerstroemia speciosa. J. Asian Nat. Prod. Res., 7: 7-12 .
    PubMed  |  Direct Link  |  

  129. Ragasa, C.Y., F. Tiu and J. Rideout, 2005. Triterpenoids from Chrysanthemum morifolium. ACGC Chem. Res. Commun., 18: 11-17.
    Direct Link  |  

  130. Ragasa, C.Y., A.L. Co and J.A. Rideout, 2005. Antifungal metabolites from Blumea balsamifera. Nat. Prod. Res., 19: 231-237.
    CrossRef  |  

  131. Ragasa, C.Y. and M.C. Cruz, 2005. Antimicrobial diterpenes from Tinospora rumphii. J. Res. Sci. Eng., 2: 30-34.
    Direct Link  |  

  132. Ragasa, C.Y. and K. Lim, 2005. Sterols from Cucurbita maxima. Philippine J. Sci., 134: 83-87.
    Direct Link  |  

  133. Ragasa, C.Y. and K. Lim, 2005. Secondary metabolites from Schefflera odorata Blanco. Philippine J. Sci., 134: 63-67.
    Direct Link  |  

  134. Ragasa, C.Y., K. Jorvina and J.A. Rideout, 2004. Triterpenes and sterols from Achras zapota. KIMIKA, 20: 1-4.
    Direct Link  |  

  135. Ragasa, C.Y., K. Jorvina and J.A. Rideout, 2004. Antimicrobial compounds from Artocarpus heterophyllus. Philippine J. Sci., 133: 97-101.
    Direct Link  |  

  136. Ragasa, C.Y., J.G. Hofilena and J.A. Rideout, 2004. Secondary metabolites from Bauhinia purpurea. Philippine J. Sci., 133: 1-5.
    Direct Link  |  

  137. Ragasa, C.Y., F. Tiu and J.A. Rideout, 2004. New cycloartenol esters from Ixora coccinea. Nat. Prod. Res. : Formerly Nat. Prod. Lett., 18: 319-323.
    CrossRef  |  

  138. Cayme, J.M.C. and C.Y. Ragasa, 2004. Structure elucidation of β-stigmasterol and β-sitosterol from Sesbania grandiflora Linn. Pers. and β-Carotene from Heliotropium indicum Linn. by NMR Spectroscopy. Kimika, 20: 5-12.
    Direct Link  |  

  139. Alimboyoguen, A.B., C.Y. Ragasa, P. Roque and A. Ng, 2004. Sterols and carotenoid from Brugmansia suaveolens. CvSU Res. J., 18: 36-37.
    Direct Link  |  

  140. Rideout, J., H.T. Ngo and C.Y. Ragasa, 2003. Polyprenols from Jatropha curcas L. with unusual ions in electrospray ionisation mass spectroscopy. ACGC Chem. Res. Commun., 16: 40-47.
    Direct Link  |  

  141. Ragasa, C.Y., J. Ganzon, J. Hofilena, B. Tamboong and J.A. Rideout, 2003. A new furanoid diterpene from Caesalpinia pulcherrima. Chem. Pharmaceutical Bull., 51: 1208-1210.
    CrossRef  |  

  142. Ragasa, C.Y., E.S.C. Javier and I.G. Tan, 2003. Antimutagenic terpenes and sterols from Vitex parviflora. Philippine J. Sci., 132: 21-25.
    Direct Link  |  

  143. Ragasa, C.Y., B. Tamboong and J.A. Rideout, 2003. Secondary metabolites from Jasminum sambac and Cananga odorata. ACGC Chem. Res. Commun., 16: 40-47.
    Direct Link  |  

  144. Ragasa, C.Y., N. Tremor and J.A. Rideout, 2002. Ionone derivatives from Alternanthera sessilis. J. Asian Nat. Prod. Res., 4: 109-115.
    CrossRef  |  

  145. Ragasa, C.Y., J.G. Hofilena and J.A. Rideout, 2002. New Furanoid Diterpenes from Caesalpinia pulcherrima. J. Nat. Prod., 65: 1107-1110.
    CrossRef  |  Direct Link  |  

  146. Ragasa, C.Y., D. Borja, R. Bassig and J.A. Rideout, 2002. Antifungal compounds from Anacardium occidentale. Philippine J. Sci., 131: 9-16.
    Direct Link  |  

  147. Hofilena, J.G. and C.Y. Ragasa, 2002. A monoteroene from Pterocarpus indicus (Leguminosae). Kimika, 18: 5-8.

  148. Ragasa, C.Y., V.F. Templora and J.A. Rideout, 2001. Diastereomeric diterpenes from Coleus blumei. Chem. Pharmaceutical Bull., 49: 927-929.
    CrossRef  |  

  149. Ragasa, C.Y., R. Dumag and J.A. Rideout, 2001. Antimicrobial compounds from Mentha cordifolia. Philippine J. Sci., 130: 39-43.
    Direct Link  |  

  150. Ragasa, C.Y., J. Yumul, J. Guanzon and J.A. Rideouf, 2001. Antimicrobial triterpenes and sterols from Pseuderanthemum bicolor. Kimika, 17: 1-4.
    Direct Link  |  

  151. Ragasa, C.Y., A. Poblete and E. Navida, 2001. Antimicrobial compounds from Spondias purpurea. Manila J. Sci., 4: 24-28.
    Direct Link  |  

  152. Ragasa, C.Y. and J.A. Rideout, 2001. An antifungal cadinanolide from Pseudoelephantopus spicatus. Chem. Pharmaceutical Bull., 49: 1359-1361.
    CrossRef  |  

  153. Ragasa, C.Y., M.C. Cruz, R. Gula and J.A. Rideout, 2000. Clerodane diterpenes from Tinospora rumphii. J. Nat. Prod., 63: 509-511.
    CrossRef  |  Direct Link  |  

  154. Ragasa, C.Y., J. Laygo and J. Rideout, 2000. Antimicrobial biflavone from Araucaria bidwillii. Kimika, 16: 65-67.
    Direct Link  |  

  155. Ragasa, C.Y., J. Hofilena and J. Rideout, 2000. Lignans from Gliricidia sepium. ACGC Chem. Res. Commun., 10: 52-60.
    Direct Link  |  

  156. Ragasa, C.Y., E. Morales and J.A. Rideout, 2000. A flavone from Vitex parviflora. Manila J. Sci., 3: 6-9.
    Direct Link  |  

  157. Hofilena, J.G., C.Y. Ragasa and J.A. Rideout, 2000. An antimicrobial and antimutagenic anthraquinone from Cassia alata. ACGC Chem. Res. Commun., 10: 15-20.
    Direct Link  |  

  158. Alea, G.V. and C.Y. Ragasa, 2000. Diterpenes from the soft coral Clavularia inflate (Coelenterata, Octocorallia, Stolonifera). Manila J. Sci., 3: 25-33.
    Direct Link  |  

  159. Ragasa, C.Y., Z. Pendon, V. Sangalang and J. Rideout, 1999. Flavones from Coleus amboinicus. Philippine J. Sci., 128: 347-351.
    Direct Link  |  

  160. Ragasa, C.Y., G.V. Alea and J.A. Rideout, 1999. An antimicrobial sesquiterpene lactone from Pseudoelephantopus spicatus. Manila J. Sci., 2: 27-31.

  161. Ragasa, C.Y., E.A. Juan and J.A. Rideout, 1999. A triterpene from Ficus pumila. J. Asian Nat. Product. Res., 1: 269-275.
    CrossRef  |  PubMed  |  Direct Link  |  

  162. Ragasa, C.Y., E. Morales and J.A. Rideout, 1999. Antimicrobial compounds from Vitex negundo. Philippine J. Sci., 128: 21-29.
    Direct Link  |  

  163. Ragasa, C.Y., V.M. Intel and J.A. Rideout, 1998. An antimicrobial alkaloid from Catharanthus roseus. Manila J. Sci., 1: 19-27.
    Direct Link  |  

  164. Ragasa, C.Y., R. Daniel and J.A. Rideout, 1998. An antifungal tetranortriterpenoid from Swietenia macrophylla. Kimika, 14: 21-25.
    Direct Link  |  

  165. Ragasa, C.Y., M.M. Tepora and J. Rideout, 1998. Antimicrobial chromenes from Eupatorium toppingianum. ACGC Chem. Res. Commun., 7: 54-61.
    Direct Link  |  

  166. Ragasa, C.Y., M. Dumato and J. Rideout, 1998. Antifungal compounds from Peperomia pellucid. ACGC Chem. Res. Commun., 7: 48-53.
    Direct Link  |  

  167. Ragasa, C.Y., J. Sy, J.C. Coll, J.A. Rideout, 1998. A bioactive monoterpene ester from Erigeron linifolius. Asia Life Sci., 7: 1-9.
    Direct Link  |  

  168. Ragasa, C.Y., G.M. Natividad and J.A. Rideout, 1998. An antifungal diterpene from Chrysanthemum coronarium. Kimika, 14: 17-20.
    Direct Link  |  

  169. Ragasa, C.Y., B.A. Penalosa and J. Rideout, 1998. A bioactive dipeptide derivative from Malachra fasciata. Philippine J. Sci., 127: 267-276.
    Direct Link  |  

  170. Inte, V.M., C.Y. Ragasa and J.A. Rideout, 1998. Triterpenes, hydrocarbons and an antimutagenic alkaloids from Catharanthus roseus. Asia Life Sci., 7: 11-21.
    Direct Link  |  

  171. Ragasa, C.Y., Z.D. Nacpil, G.M. Natividad, M. Tada, J.C. Coll and J.A. Rideout, 1997. Tetranortriterpenoids from Azadirachta indica. J. Phytochem., 46: 555-558.

  172. Ragasa, C.Y., Z.D. Nacpil, B.A. Penalosa, J.C. Coll and J.A. Rideout, 1997. Antimutagen and antifungal compounds from Cosmos caudatus. Philipp. J. Sci., 126: 199-206.

  173. Ragasa, C.Y., V. Agbayani, R.B. Hernandez and J.A. Rideout, 1997. An antimutagenic monoterpene from Malachra fasciata. Philippine J. Sci., 126: 183-189.
    Direct Link  |  

  174. Ragasa, C.Y., L. Maliwat and B.F. Bowden, 1997. Antifungal and antimutagenic terpenes from Hyptis suaveolens. Kimika, 13: 17-21.
    Direct Link  |  

  175. Ragasa, C.Y., J.O. Sy, J.C. Coll, V.M.L. Inte and J.A. Rideout, 1997. Bioactive monoterpene glycosides from Erigeron linifolius. Phytochemistry, 46: 151-154.
    CrossRef  |  Direct Link  |  

  176. Ragasa, C.Y., J.A. Rideout, J.C. Coll and D.S. Tierra, 1997. Sesquiterpene glycosides from Pittosporum pentandrum. Phytochemistry, 45: 545-547.
    CrossRef  |  Direct Link  |  

  177. Ragasa, C.Y., G.M. Natividad and J.A. Rideout, 1997. A bioactive thiophene derivative from Chrysanthemum coronarium. Philipp. J. Sci., 126: 275-281.
    Direct Link  |  

  178. Ragasa, C.Y., C.A. Cruz, I.D. Chiong, M. Tada and J.A. Rideout, 1997. Antifungal flavonoids from Waltheria Americana. Philipp. J. Sci., 126: 243-250.
    Direct Link  |  

  179. Nacpil, Z.D., C.Y. Ragasa, J.A. Rideout and J.C. Coll, 1997. Antimutagenic diterpenes from Andrographis paniculata. Kimika, 13: 11-16.
    Direct Link  |  

  180. Maliwat, L., C.Y. Ragasa and M. Tada, 1997. Alkaloid and saponin from Argemone mexicana. Kimika, 13: 7-9.
    Direct Link  |  

  181. Largo, G., J.A. Rideout and C.Y. Ragasa, 1997. A bioactive carotenoid from Mimosa invisa. Philippine J. Sci., 126: 107-114.

  182. Juan, E.A., J.A. Rideout and C.Y. Ragasa, 1997. Bioactive furanocoumarin derivatives from Ficus pumila. Philippine J. Sci., 126: 143-153.
    Direct Link  |  

  183. Barre, J.T., B.F. Bowden, J.C. Coll, J. de Jesus, V.E. de La Fuente, G.C. Janairo and C.Y. Ragasa, 1997. A bioactive triterpene from Lantana camara. Phytochemistry, 45: 321-324.
    CrossRef  |  PubMed  |  Direct Link  |  

  184. Largo, G., C.Y. Ragasa , J.C. Coll and J.A. Rideout, 1996. A bioactive chromene from Eupatorium toppingianum. Kimika, 12: 11-14.
    Direct Link  |  

  185. Zulueta, M.C.A., M. Tada and C.Y. Ragasa, 1995. A diterpene from Bidens pilosa. Phytochemistry, 38: 1449-1450.
    CrossRef  |  Direct Link  |  

  186. Ragasa, C.Y., J. Sy, V. Agbayani, R. Infante, M. Abaya and J.C. Coll, 1995. Antimutagens from Elephantopus scaber. Kimika, 11: 25-28.
    Direct Link  |  

  187. Ragasa, C.Y., I.D. Chiong and Z.D. Nacpil, 1995. Antimutagens from Vernonia cinerea. Agham, 19: 1-7.
    Direct Link  |  

  188. Ragasa, C.Y., 1995. Flavanones and triterpenes from Ageratum conyzoides. Agham, 19: 21-25.
    Direct Link  |  

  189. Ragasa, C.Y., W.G. Padolina, T. Yamauchi, H. Otsuka, K. Yamasaki and T. Satoh, 1993. Germacranolides from Pseudoelephantopus spicatus. Phytochemistry, 33: 627-629.
    CrossRef  |  Direct Link  |  

  190. Ragasa, C.Y., Padolina, W.G., B.F. Bowden, S. Li, D.M. Tapiolas and J.C. Coll, 1993. New eudesmanolide sesquiterpenes from a Philippines collection of Wedelia prostate. J. Nat. Prod., 56: 386-393.
    CrossRef  |  Direct Link  |