title: Antifungal dibenzofuran bis(bibenzyl)s from the liverwort Asterella angusta.
abstract: Bioactivity-guided separation of an antifungal extract from the liverwort Asterella angusta afforded four bis(bibenzyl)s, asterelin A (1), asterelin B (2), 11-O-demethyl marchantin I (3), and dihydroptychantol A (4), together with six known ones. Their structures were established by extensive spectroscopic analysis (1D and 2D-NMR, MS), and that of 2 was confirmed by X-ray crystallographic diffraction analysis. Compounds 1 and 2 are the first examples of dibenzofuran bis(bibenzyl)s. The antifungal activity of the isolated bis(bibenzyl)s against the common clinical pathogenic fungus Candida albicans was evaluated using both the thin-layer chromatography bioautographic assay and the broth microdilution method. They showed moderate antifungal activities with minimal inhibitory concentration (MIC) values ranging from 16 microg/ml to 512 microg/ml.
authors.affiliation: School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, PR China.
authors.forename: Jianbo
authors.initials: J
authors.lastname: Qu
authors.forename: Chunfeng
authors.initials: C
authors.lastname: Xie
authors.forename: Huaifang
authors.initials: H
authors.lastname: Guo
authors.forename: Wentao
authors.initials: W
authors.lastname: Yu
authors.forename: Hongxiang
authors.initials: H
authors.lastname: Lou
mesh_terms: D000935:Antifungal Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D001572:Benzofurans / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D001632:Bibenzyls / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D002176:Candida albicans / Q000187:drug effects*; D018360:Crystallography, X-Ray; D035926:Hepatophyta / Q000737:chemistry*; D013058:Mass Spectrometry; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular
chemical_list: D000935:Antifungal Agents; D001572:Benzofurans; D001632:Bibenzyls