Dimeric Coumarin and Phenylpropanoids fromClausena lenis

Abstract

A new dimeric coumarin, diseselin B (1), and three new phenylpropanoids, lenisin A–C (2–4), together with eight known O-terpenoidal coumarins, were isolated from the aerial part of Clausena lenis. Lenisin A (2) was also isolated from the aerial part of C. excavata. The structures were elucidated on the basis of 1D- and 2D-NMR experiments (HMQC, HMBC, and 1H,1H-COSY).