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Two new phenolic glucosides and an ellagitannin from the leaves of Castanopsis sclerophylla

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Title: Two new phenolic glucosides and an ellagitannin from the leaves of Castanopsis sclerophylla
Authors: Huang, Yong-Lin / Tanaka, Takashi / Matsuo, Yosuke / Kouno, Isao / Li, Dian-Peng / Nonaka, Gen-Ichiro
Issue Date: Mar-2012
Publisher: Elsevier BV
Citation: Phytochemistry Letters, 5(1), pp.158-161; 2012
Abstract: In the course of a chemotaxonomical study of Castanopsis species (Fagaceae), detailed investigation of the leaves of C. sclerophylla led to isolation of three new phenolic compounds together with 62 known compounds. The structures of the new compounds were elucidated as 2-O-galloyl-O-4,6-(S)-valoneoyl-d-glucose (1), 6-O-galloyl-1-O-vanilloyl-β-d-glucose (2), and 4″-O-galloylchestanin (3) by means of spectroscopic analyses and enzymatic hydrolysis with tannase. Comparison with other Castanopsis species indicated that C. sclerophylla characteristically accumulates chlorogenic acid and a dimeric ellagitannin, rugosin E. Triterpene hexahydroxydiphenoyl esters, which are major constituents of C. cuspidata var. sieboldii, C. hystrix, and C. fissa were not detected.
Keywords: Castanopsis sclerophylla / Ellagitannin / Fagaceae / Phenolic glucoside
URI: http://hdl.handle.net/10069/27309
ISSN: 18743900
DOI: 10.1016/j.phytol.2011.11.014
Rights: © 2011 Phytochemical Society of Europe.
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/27309

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