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ORIGINAL ARTICLE
Year : 2010  |  Volume : 6  |  Issue : 23  |  Page : 212-218

Phytochemical investigation and antimicrobial activity of Psidium guajava L. leaves


Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt

Correspondence Address:
S M El Sohafy
El Khartoum Square, Azarita, Faculty of pharmacy, Alexandria
Egypt
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0973-1296.66939

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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-b-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.


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