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. 2021 Mar:149:104811.
doi: 10.1016/j.fitote.2020.104811. Epub 2021 Jan 7.

Chlorinated bianthrones from the cyanolichen Nephroma laevigatum

Aurélie Lagarde  1 , Lengo Mambu  2 , Phuong-Y Mai  1 , Yves Champavier  3 , Jean-Luc Stigliani  4 , Mehdi A Beniddir  5 , Marion Millot  6
Affiliations

Chlorinated bianthrones from the cyanolichen Nephroma laevigatum

Aurélie Lagarde et al. Fitoterapia. 2021 Mar.

Abstract

While depsidones, depsides or dibenzofuran-like compounds dominate the chemical composition of lichens, the cyanolichen Nephroma laevigatum affords a diversity of quinoid pigments represented by chlorinated anthraquinones derived from emodin and new bianthrones resulting from the homo- or heterodimerization of monomers. Bianthrones were pointed out from the dichloromethane extract by MS/MS-based molecular networking, then isolated and characterized on the basis of extensive spectroscopic analyzes and GIAO NMR shift calculation followed by CP3 analyzes.

Keywords: Bianthrones; Dereplication; Lichens; NMR calculations; Nephroma.

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