摘要

Bioassay-guided fractionation of the diethyl ether extract of the liverwort Asterella angusta led to the isolation of two antifungal bis(bibenzyl)s, riccardin 1(1), and angustatin A (2). Their structures were established by spectroscopic analysis (1D NMR and 2D NMR, IR, MS). Compound 1 is a novel variant riccardin-type bis(bibenzyl), while compound 2 is the first nonheteratom-containing variant bis(bibenzyl) possessing a bibenzyl-phenanthrene skeleton.

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