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Paper | Regular issue | Vol 78, No. 8, 2009, pp.1993-2001
Published online, 1st April, 2009
DOI: 10.3987/COM-09-11683
Two New Hydrolyzable Tannins, Carpinerins A and B, from Galls of Carpinus tschonoskii

Takako Ono and Hideyuki Shigemori*

*Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305, Japan

Abstract

Two new hydrolyzable tannins, carpinerins A (1) and B (2), together with ten known tannins 3-12, were isolated from the galls on bud of Carpinus tschonoskii, and the structures of 1 and 2 were elucidated using spectroscopic data, primarily NMR and MS, and chemical means. Most of isolated tannins including carpinerin B (2) exhibited inhibitory effects on the growth of the root of cress (Lepidium sativum L.) seedling at 1×10-4 mol/L.