title: Triterpene Galloyl Esters from Edible Acorn of Castanopsis cuspidata.
abstract: Polyphenols of edible acorns of Castanopsis cuspidata were examined and two triterpene galloyl esters were isolated. Based on two-dimensional NMR spectroscopic evidence the structures were determined to be 3,24-di-O-galloyl-2α,3β-23,24-tetrahydroxyolean-12-en-28-oic acid (1) and 3,24-di-O-galloyl- 2α,3β-23,24-tetrahydroxyurs-12-en-28-oic acid (2). The triterpene hexahydroxydiphenoyl esters, which had been found in the leaves, were not detected in the acorns.
authors.forename: Misaki
authors.initials: M
authors.lastname: Ogata
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Saito
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Matsuo
authors.forename: Hajime
authors.initials: H
authors.lastname: Maeda
authors.forename: Takashi
authors.initials: T
authors.lastname: Tanaka
mesh_terms: D029962:Fagaceae / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry*
chemical_list: C000607056:3,24-di-O-galloyl- 2alpha,3beta-23,24-tetrahydroxyurs-12-en-28-oic acid; C000607055:3,24-di-O-galloyl-2alpha,3beta-23,24-tetrahydroxyolean-12-en-28-oic acid; D014315:Triterpenes