In addition to fourteen known glycosides from leaves of Quercus laurifolia Michx., a new acylated triterpene soponin has been isolated and identified as 3-O-galloyl-28-beta-D-glucopyranosyl diester of the 2alpha,3beta,19alpha,23-tetrahydroxyurs-12-ene-28-oic acid (1). The structure of the previously described alpha-D-glucopyranosyl ester of the 2alpha,3beta,19alpha,23-tetrahydroxyurs-12-ene-28-oic acid was revised to beta-D-glucopyranosyl ester of the 2alpha,3beta,19alpha,23-tetrahydroxyurs-12-ene-28-oic acid (2).
Constituents of Cupuliferae. XVII. Triterpene saponins and flavonoids from Quercus laurifolia Michx.
PIZZA, Cosimo;DE TOMMASI, Nunziatina
1993
Abstract
In addition to fourteen known glycosides from leaves of Quercus laurifolia Michx., a new acylated triterpene soponin has been isolated and identified as 3-O-galloyl-28-beta-D-glucopyranosyl diester of the 2alpha,3beta,19alpha,23-tetrahydroxyurs-12-ene-28-oic acid (1). The structure of the previously described alpha-D-glucopyranosyl ester of the 2alpha,3beta,19alpha,23-tetrahydroxyurs-12-ene-28-oic acid was revised to beta-D-glucopyranosyl ester of the 2alpha,3beta,19alpha,23-tetrahydroxyurs-12-ene-28-oic acid (2).File in questo prodotto:
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