Secondary Metabolites from Bauhinia purpurea
Consolacion Y. Ragasa1, Joy Hofileña1 and John A. Rideout2
1Chemistry Department, De La Salle University
Taft Avenue, Manila, Philippines
2School of Chemical and Biomedical Sciences
Central Queensland University, Rockhampton
Queensland, Australia
corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
ABSTRACT
The leaves of Bauhinia purpurea afforded a mixture of phytol fatty esters (1a, 1b, 1c, 1d, 1e, 1f), lutein, and b-sitosterol. The structure of 1 was elucidated by NMR spectroscopy, while the chain lengths of the esterified fatty acids in 1 were determined by mass spectrometry. The structures of lutein and b-sitosterol were identified by comparison of their NMR spectral data with those reported in the literature. Antimicrobial tests indicated that 1 has low activity against the fungi, A. niger and C. albicans, and inactive against the bacteria, P. aeruginosa, S. aureus, B. subtilis, E. coli, and the fungus, T. mentagrophytes.
INTRODUCTION
Bauhinia purpurea, commonly known as "alibangbang" is a small size tree found throughout the Philippines. It has a number of reported medicinal uses. The infusion of the fresh flowers and the decoction of the bark are antidysenteric. A decoction of the root bark is a remedy for liver trouble, while the seeds exhibit hemolytic activity. The leaves are applied to the head during fevers accompanied by headaches (Quisumbing 1978). A number of studies reported the isolation of flavanoids and flavone glycosides (Yavada & Sodhi 2001; Yavada & Tripathi 2001; Kou et al. 1989; Abd-El-Wahab et al. 1987), saponin, and triterpenoids (Kou & Yeh 1997, 1998), terpenes (Shah et al. 1977) and fatty acids . . . .
REFERENCES
ABD-EL-WAHAB SM, WASSEL GM, AMMAR NM. Herba Hung. 1987, 26(1): 27-39.
Dictionary of Natural Products, 1st ed. Chapman and Hall, 1994. .
GOODMAN RA, OLDFIELD E, ALLERHAND AJ. Am. Chem. Soc. 1973, 95(23): 7553-58.
KAFUKU K, HATS CJ. Chem. Soc. 1934, 55: 369-375.
KREGER-VAN RIJ Ed. The Yeast: A Taxonomic Study, 3rd ed.; Elsevier Science Publisher BV: Amsterdam, 1984.
KUO YH, YEH MH. Chem. Pharm. Bull. 1998, 46(10): 1630-31.
KUO YH, YEH MH. J. Chin. Chem. Soc. 1997, 44(4): 379-383.
KUO YH, YEH MH, HUANG SL. Phytochem. 1989, 49(8): 2529-30.
LARGO G, RIDEOUT JA, RAGASA CY. Philipp. J Sci. 1997, 126: 107. .
QUISUMBING E. Medicinal Plants of the Philippines. Bureau of Printing: Manila, 1978; p. 372-377.
RUBISTEIN I, GOAD J, CLAGUE ADA, MULHEIRN L. J. Phytochem. 1976, 15: 195.
SHAH WH, JABBAR A, KAUSAR S, PAK J, AMMAR NM. Sci. Ind. Res., 1977, 20(6): 384-388.
YAVADA RN, SODHI S. Asian J. Chem. 2001, 13(2): 529-533.
YAVADA RN, TRIPATHI P. Fitoterapia. 2000, 71(1): 88-90.
