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Phytochemical investigation and antimicrobial activity of Psidium guajava L. leaves

By A. M. Metwally, A. A. Omar, F. M. Harraz and S. M. El Sohafy

Abstract

Psidium guajava L. leaves were subjected to extraction, fractionation and isolation of the flavonoidal compounds. Five flavonoidal compounds were isolated which are quercetin, quercetin-3-O-α-L-arabinofuranoside, quercetin-3-O-β-D-arabinopyranoside, quercetin-3-O-β-D-glucoside and quercetin-3-O-β-D-galactoside. Quercetin-3-O-β-D-arabinopyranoside was isolated for the first time from the leaves. Fractions together with the isolates were tested for their antimicrobial activity. The antimicrobial studies showed good activities for the extracts and the isolated compounds

Topics: Original Article
Publisher: Medknow Publications
OAI identifier: oai:pubmedcentral.nih.gov:2950385
Provided by: PubMed Central
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