Pseudodestruxins A and B: new cyclic depsipeptides from the coprophilous fungus Nigrosabulum globosum
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Published on: January 13, 2017
Y Che1, D C Swenson, J B Gloer
1Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, USA.
Abstract:
Pseudodestruxins A (1) and B (2), two new cyclic peptides, have been isolated from cultures of the coprophilous fungus Nigrosabulum globosum. The structure of pseudodestruxin A (1) was elucidated using 2D NMR techniques and confirmed by single-crystal X-ray diffraction analysis. The structure of 2 was assigned by comparing its NMR and FABMS data with those of compound 1. The known compounds ascochlorin and 5-chlorocollectorin B were also isolated from N. globosum. Although 1 and 2 display antibacterial effects, ascochlorin was found to be responsible for the antifungal activity of the crude extract.
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