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Structures of two novel isomeric triterpenoid saponins from Anthocephalus cadamba

✍ Scribed by Niranjan P. Sahu; Kazuo Koike; Zhonghua Jia; Basudeb Achari; Sukdeb Banerjee; Tamotsu Nikaido

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 91 KB
Volume: 37
Category: Article
ISSN: 0749-1581
DOI: 10.1002/(sici)1097-458x(199911)37:11<837::aid-mrc567>3.0.co;2-y

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✦ Synopsis

Two novel triterpenoid saponins, phelasin A (1) and phelasin B (2), were isolated from the bark of Anthocephalus cadamba (Roxb) Miq. The structures were established by one-and two-dimensional 1 H and 13 C NMR spectroscopy. The aglycone of 1, phelasingenin (3), is a new compound characterized as 3ˇ-hydroxy-olean-18-ene-27,28-dioic acid. Molecular mechanics and molecular dynamics studies carried out on 3 showed the preferred conformation adopted by the molecule.

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