Studies on the Constituents of Osmanthus Species. VII. Structures of Lignan Glycosides from the Leaves of Osmanthus asiaticus NAKAI

Abstract

A new lignan glycoside, named isoeucommin A (I), and four known lignan glucosides, (+)-syringaresinol-O-β-D-glucopyranoside (II), phillyrin (III), (-)-olivil-4"-β-D-glucopyranoside (IV) and pinoresinol-O-β-D-glucopyranoside (V), were isolated from the leaves of Osmanthus asiaticus NAKAI (Oleaceae). The structure of I was determined to be (+)-medioresiono-4"-O-β-D-glucopyranoside on the basis of chemical and spectral data.