New lignan butenolides from bupleurum salicifolium

Abstract

Three new lignans were obtained from the roots of Bupleurum salicifolium (Umbelliferae). Two proved to be butenolides, methylchasnarolide [1] and chasnarolide [3], and the other, a γ-butyrolactone, was benchequiol [6]. Their structures were determined by spectral and chemical means. © 1993, American Chemical Society. All rights reserved.