Tannins of Rosaceous Plants. IX. Rugosins D, E, F and G, Dimeric and Trimeric Hydrolyzable Tannins with Valoneoyl Group(s) from Flower Petals of Rosa rugosa Thunb

Abstract

Three dimeric hydrolyzable tannins having a valoneoyl group, rugosins D (1), E (2) and F (3), and a trimeric hydrolyzable tannin having two valoneoyl groups, rugosin G (4), were isolated from flower petals of Rosa rugosa (Rosaceae), and their structures including the orientation of the valoneoyl groups were established. © 1990, The Pharmaceutical Society of Japan. All rights reserved.