Research Topics
| C Y RagasaSummaryAffiliation: De La Salle University Country: Philippines Publications
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Detail Information
Publications
Clerodane diterpenes from Tinospora rumphiiC Y Ragasa
Chemistry Department, De La Salle University, Manila, Philippines
J Nat Prod 63:509-11. 2000..Two new diterpenes (1 and 2) were obtained from the leaves of Tinospora rumphii, along with the known compounds tinotufolin D and vitexilactone. The structures of compounds 1 and 2 were established on the basis of spectroscopic studies...- A triterpene from Ficus pumilaC Y Ragasa
Chemistry Department, De La Salle University, Manila, Philippines
J Asian Nat Prod Res 1:269-75. 1999..It showed antimicrobial activity against Escherichia coli, Pseudomonas aeruginosa, Bacillus subtilis and Candida albicans with an average antimicrobial index of 0.5, 0.3, 0.3 and 0.7, respectively, at a concentration of 30 microg... - An antifungal cadinanolide from Pseudoelephantopus spicatusC Y Ragasa
Chemistry Department, De La Salle University, Manila, Philippines
Chem Pharm Bull (Tokyo) 49:1359-61. 2001..It was found to exhibit moderate antifungal activity against C albicans and A. niger, and low activity against T. mentagrophytes, S. aureus, E. coli and P. aeruginosa. It was inactive against B. subtilis... - Ionone derivatives from Alternanthera sessilisConsolacion Y Ragasa
Chemistry Department, De La Salle University, Manila, Philippines
J Asian Nat Prod Res 4:109-15. 2002..Antimicrobial tests on the mixture of diastereomers and the derivative indicated that they have low activities against Pseudomonas aeruginosa and Trichophyton mentagrophytes... - Chromomoric acid derivatives from Tectona philippinensisConsolacion Y Ragasa
Chemistry Department and Center for Natural Sciences and Ecological Research, De La Salle University, 2401 Taft Avenue, 1004 Manila, Philippines
J Nat Prod 71:701-5. 2008..Their structures were elucidated by extensive 1D and 2D NMR spectroscopy. Antimicrobial testing was carried out on 1- 3 against a panel of bacteria and fungi... - Iridoids from Gardenia jasminoidesConsolacion Y Ragasa
Chemistry Department, De La Salle University, Manila, Philippines
Nat Prod Res 21:1078-84. 2007..coli, Pseudomonas aeruginosa, Staphylococcus. aureus, and Trichophyton mentagrophytes; and inactive against Bacillus subtilis and Aspergillus niger... - Monoterpene lactones from the seeds of Nephelium lappaceumConsolacion Y Ragasa
Chemistry Department, De La Salle University, 2401 Taft Avenue, Manila, 1004, Philippines
J Nat Prod 68:1394-6. 2005..Compounds 1 and 2 represent a new monoterpene skeleton, and their structures were elucidated by extensive 1D and 2D NMR spectral data interpretation. Antimicrobial testing was carried out on 1 and 2 against a panel of bacteria and fungi... - Antimicrobial terpenoids from Pterocarpus indicusConsolacion Y Ragasa
Chemistry Department, De La Salle University, 2401 Taft Avenue, Manila 1004, Philippines
Nat Prod Res 19:305-9. 2005..It was found inactive against Staphylococcus aureus, Bacillus subtilis, and Trichophyton mentagrophytes... - Antifungal metabolites from Blumea balsamiferaConsolacion Y Ragasa
Chemistry Department, De La Salle University, 2401 Taft Avenue, Manila 1004, Philippines
Nat Prod Res 19:231-7. 2005..niger, T. mentagrophytes, and C. albicans. Both compounds have no antimicrobial activity against Psuedomonas aeruginosa, Staphylococcus aureus, Bacillus subtilis, and Escherichia coli... - Terpenoids and sterols from Lagerstroemia speciosaConsolacion Y Ragasa
Chemistry Department, De La Salle University, Manila, Philipines
J Asian Nat Prod Res 7:7-12. 2005..The structure of 4 was elucidated by 1D and 2D NMR and mass spectroscopy... - New cycloartenol esters from Ixora coccineaConsolacion Y Ragasa
Chemistry Department, De La Salle University, 2401 Taft Avenue, Manila 1004, Philippines
Nat Prod Res 18:319-23. 2004..afforded two new cycloartenol esters (1a and 1b), lupeol fatty ester, lupeol, ursolic acid, oleanolic acid, and sitosterol. The structures of 1a and 1b were elucidated by extensive 1D and 2D NMR spectroscopy and MS... - A new furanoid diterpene from Caesalpinia pulcherrimaConsolacion Y Ragasa
Chemistry Department, De La Salle University, Manila, Philippines
Chem Pharm Bull (Tokyo) 51:1208-10. 2003..The structure of 1 was elucidated by spectral data interpretation... - New furanoid diterpenes from Caesalpinia pulcherrimaConsolacion Y Ragasa
Chemistry Department, De La Salle University, 2401 Taft Avenue, Manila, 1004 Philippines
J Nat Prod 65:1107-10. 2002..Antimicrobial tests on 1-5 indicated that they were active against several bacteria (S. aureus, E. coli, P. aeruginosa, and B. subtilis) and fungi (C. albicans and T. mentagrophytes)... - Secondary metabolites from Tectona philippinensisConsolacion Y Ragasa
Chemistry Department, De La Salle University, 1004 Manila
Nat Prod Res 22:820-4. 2008..Compound 1 was also found to have low antibacterial activity against Escherichia coli and Pseudomonas aeruginosa... - New xenicanes from Xenia viridisJaime Raul O Janairo
Chemistry Department and Center for Natural Sciences and Ecological Research, De La Salle University 2401, Taft Avenue, Manila, Philippines
Nat Prod Res 21:1067-72. 2007..The oxirane ring of 3 was found to be susceptible to a slow ring opening under acidic conditions to afford 5. Their structures were elucidated by extensive 1D and 2D NMR spectroscopy... - A marine verticillane diterpenoid from Cespitularia erectaJaime Raul O Janairo
Chemistry Department and Center for Natural Science and Ecological Research, De La Salle University, Manila, Philippines
Nat Prod Res 22:48-52. 2008..The dichloromethane extract of Cespitularia erecta afforded a new verticillane diterpenoid (1) and sarcophytol A (2) by silica gel chromatography. The structure of 1 was elucidated by extensive 1D and 2D NMR spectroscopy... - A new rearranged dolabellane diterpene from the soft coral Clavularia inflataGlenn V Alea
Chemistry Department, De La Salle University Manila, Manila, 1004, Philippines
Nat Prod Res 22:814-9. 2008..The absolute stereochemistry of C-7 was determined by analyses of 1 separately esterified with R and S O-mandelic acids...