Tannins and Related Polyphenols of Rosaceous Medicinal Plants. IV. Roxbins A and B from Rosa roxburghii Fruits

TAKASHI YOSHIDA; XIN-MIN CHEN; TSUTOMU HATANO; MAKOTO FUKUSHIMA; TAKUO OKUDA

doi:10.1248/cpb.35.1817

Tannins and Related Polyphenols of Rosaceous Medicinal Plants. IV. Roxbins A and B from Rosa roxburghii Fruits

TAKASHI YOSHIDA, XIN-MIN CHEN, TSUTOMU HATANO, MAKOTO FUKUSHIMA, TAKUO OKUDA

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Keywords: Rosa roxburghii, Rosaceae, tannin, ellagitannin, roxbin A, roxbin B, centrifugal partition chromatography

JOURNAL FREE ACCESS

1987 Volume 35 Issue 5 Pages 1817-1822

DOI https://doi.org/10.1248/cpb.35.1817

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Abstract

From the unripe fruits of Rosa roxburghii TRATT., two new hydrolyzable tannins, roxbin A (1) (a dimeric ellagitannin) and roxbin B (9), were isolated along with rugosin F (2), pedunculagin (3), casuarictin (4), alnusiin (5), stachyurin (6), tellimagrandin 11 (7), 2, 3-Ο- (S) -hexahydroxydiphenoyl-D-glucose and (+) -catechin. The structures of new tannins were elucidated on the basis of chemical and spectral evidence.

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