期刊
TETRAHEDRON LETTERS
卷 54, 期 49, 页码 6751-6754出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2013.10.005
关键词
Endophyte; Pestalotiopsis theae; Turraeanthus longipes; Cytosporin; Structure elucidation
资金
- BMBF
- DAAD (Deutscher Akademischer Austauschdienst)
Chemical investigation of an endophytic fungus, Pestalotiopsis theae, isolated from the leaves of Turraeanthus longipes (Meliaceae) collected in Cameroon, resulted in the isolation of six new epoxyquinols, cytosporins F-K (2-7), together with the known cytosporin D (1). The structures of the new compounds were unambiguously determined by analysis of the 1D, 2D NMR, and HRMS spectra. Cytosporins G-K (3-7) are the first cytosporins with a hydroxyl substituted C-7 side chain, while cytosporins F-I (2-5) contain a 13-acetoxyl group that was not reported previously. A plausible biosynthetic pathway for the cytosporin derivatives is proposed. (C) 2013 Elsevier Ltd. All rights reserved.
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