Berchemolide, a Novel Dimeric Vanillic Acid Glucoside from Berchemia racemosa

Nobuko SAKURAI; Masato KOBAYASHI; Atsushi SHIGIHARA; Takao INOUE

doi:10.1248/cpb.40.851

Nobuko SAKURAI, Masato KOBAYASHI, Atsushi SHIGIHARA, Takao INOUE

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Keywords: Berchemia racemosa, Rhamnaceae, berchemolide, cyclic dimer, vanillic acid glucoside, MNDO, CD spectrum

JOURNAL FREE ACCESS

1992 Volume 40 Issue 4 Pages 851-853

DOI https://doi.org/10.1248/cpb.40.851

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Abstract

A new phenol glycoside named berchemolide was isolated together with (+)-catechin and (-)-epicatechin (as acetates), from the stems of Berchemia racemosa SIEB. et ZUCC. (Rhamnaceae). The structure of berchemolide, having a dimeric dilactone structure with a 22-membered ring, was determined on the basis of spectral and chemical investigations. The conformation of berchemolide was calculated by MNDO (modified neglect of diatomic overlap).

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