Tannins And Related Polyphenols of Rosaceous Medicinal Plants: Xii: Roshenins A—E, Dimeric Hydrolyzable Tannins From Rosa Henryi boul

Abstract

Five new hydrolyzable tannin dimers, roshenins A—E, and eight known tannins and related polyphenols [(4- )-catechin, (— )-epicatechin, procyanidins B-3 and B-4, sanguisorbic acid dilactone, sanguiins H-2, H-6 and lambertianin A], have been isolated from the root of Rosa henryi boul. The structures of roshenins A—E (9—12, 19), which have a sanguisorboyl group as a linking unit between monomeric components, were established on the basis of spectral and chemical evidence. © 1992, The Pharmaceutical Society of Japan. All rights reserved.