Journal
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY
Volume 66, Issue 8, Pages 1727-1730Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1271/bbb.66.1727
Keywords
Psidium guajava; morin glycoside; Bacillus cereus; Salmonella enteritidis
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Four antibacterial compounds were isolated from,leaves of guava (Psidium guajava L.), and the structures of these compounds were established on the basis of chemical and spectroscopic evidence. Two new flavonoid glycosides, morin-3-O-alpha-L-lyxopyranoside and morin-3-O-alpha-L-arabopyranoside, and two known flavonoids, guaijavarin and quercetin, were identified. The minimum inhibition concentration of morin-3-O-alpha-L-lyxopyranoside and morin-3-O-alpha-L-arabopyranoside was 200 mug/ml for each against Salmonella enteritidis, and 250 mug/ml and 300 mug/ml against Bacillus cereus, respectively.
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