Benzoyl esters and flavones from the leaves of Polyalthia parviflora

Nguyen Thi Minh Hang, Nguyen Thi Tu Oanh, Cao Thi Hue, To Hai Tung, Ha Thi Thoa, Le Nguyen Thanh, Tran Huu Giap, Nguyen Van Hung, Chau Van Minh

Abstract


Two benzoyl esters, benzyl 2,6-dimethoxybenzoate (1), benzyl 2,5-dihydroxybenzoate (2), together with three flavones, 5-hydroxy-3,4’,7-trimethoxyflavone (3), 3,5-dihydroxy-4’,7-dimethoxyflavone (4) and 5,6-dihydroxy-3,4’,7-trimethoxyflavone (5), were isolated from the ethyl acetate extract of Polyalthia parviflora leaves. Their structures were elucidated on the basis of spectroscopic analysis and comparisons with related known compounds.

Keywords


Polyalthia parviflora, benzoyl ester, flavone

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