Tannins of Rosaceous Medicinal Plants. I. Structures of Potentillin, Agrimonic Acids A and B, and Agrimoniin, a Dimeric Ellagitannin

Abstract

Four new ellagitannins, potentillin (1), agrimoniin (2), and agrimonic acids A (3) and B (4), have been isolated from the roots of Agrimonia japonica (MIQ.) koidz., and their structures, with an α-glucosidic linkage, were elucidated on the basis of spectral and chemical evidence. Potentillin (1) and agrimoniin (2) have also been isolated from Potentilla kleiniana WIGHT et ARNOTT. © 1984, The Pharmaceutical Society of Japan. All rights reserved.