| Literature DB >> 12377233 |
Sabira Begum1, Syed Imran Hassan, Bina S Siddiqui, Farhana Shaheen, M Nabeel Ghayur, Anwar H Gilani.
Abstract
Two triterpenoids, 20beta-acetoxy-2alpha,3beta-dihydroxyurs-12-en-28-oic acid (guavanoic acid, 3), and 2alpha,3beta-dihydroxy-24-p-z-coumaroyloxyurs-12-en-28-oic acid (guavacoumaric acid, 7), along with six known compounds 2alpha-hydroxyursolic acid (1), jacoumaric acid (2), isoneriucoumaric acid (4), asiatic acid (5), ilelatifol D (6) and beta-sitosterol-3-O-beta-D-glucopyranoside (8), have been isolated from the leaves of Psidium guajava. Their structures were determined through spectroscopic methods. Compound 5 showed dose-dependent (10-500 microg/ml) spasmolytic activity in spontaneously contracting isolated rabbit jejunum preparations.Entities:
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Year: 2002 PMID: 12377233 DOI: 10.1016/s0031-9422(02)00190-5
Source DB: PubMed Journal: Phytochemistry ISSN: 0031-9422 Impact factor: 4.072