Eremophilane-type sesquiterpenes from cultured lichen mycobionts of Sarcographa tricosa
摘要:
Spore-derived mycobionts of the crustose lichen Sarcographa tricosa were cultivated on a malt-yeast extract medium supplemented with 10% sucrose. Chemical investigation of the cultivated colonies led to isolation of three eremophilane-type sesquiterpenes, 3-epi-petasol (1), dihydropetasol (2) and sarcographol (3), together with six known eremophilanes and ergosterol peroxide. These structures were elucidated by spectroscopic and chemical methods. This is the first report of eremophilane-type sesquiterpenes from the cultured mycobionts of lichen. (C) 2012 Elsevier Ltd. All rights reserved.
Homopetasinic acid (1) was isolated from fungi of the Diaporthe sp. strain 1308-05. NMR spectroscopic structural analysis revealed a petasol (3) substructure and a (4E,6E)-7-carboxy-3-hydroxy-2-methylhepta-4,6-dienoate side chain. The absoluteconfiguration of the petasol moiety was established by the specificrotation value after basic hydrolysis. The (2′S,3′S)-configuration of the side chain was
Bioactive sesquiterpene derivatives from mangrove endophytic fungus Phomopsis sp. SYSU-QYP-23: Structures and nitric oxide inhibitory activities
作者:Yan Chen、Hongju Liu、Ge Zou、Wencong Yang、Lishan Zhang、Zhangyuan Yan、Yuhua Long、Zhigang She
DOI:10.1016/j.bioorg.2020.104530
日期:2021.2
Eight new sesquiterpene derivatives (2, 4-6 and 10-13), along with five known analogues were isolated from the mangrove endophytic fungus Phomopsis sp. SYSU-QYP-23. Their structures of new compounds were established by spectroscopic methods, and the absoluteconfigurations were confirmed by single-crystal X-ray diffraction analysis and comparison of the experimental ECD spectra. The absolute configuration