The Constituents of Eucommia ulmoides Oliv. II. Isolation and Structures of Three New Lignan Glycosides

Abstract

Three new lignan glycosides were isolated from the bark of Eucommia ulmoides Oliv.(Eucommiaceae). Their structures were established as (— )-olivil 4’,4’’-di-0-β-D-glucopyranoside (1), (+)-l-hydroxypinoresinol 4’,4’’-di-O-β-D-glucopyranoside (2) and (+ )-medioresinol 4’β-D-glucopyranoside (named eucommin A) (3), based on chemical evidence and spectroscopic studies. A known lignan glycoside, (+ )-syringaresinol O-β-D-glucopyranoside (4) was also isolated. © 1985, The Pharmaceutical Society of Japan. All rights reserved.