期刊
TETRAHEDRON
卷 75, 期 33, 页码 4611-4619出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2019.07.003
关键词
Meroterpenoid; Phyllosticta capitalensis; Cephalotaxus fortunei hook; Endophytic fungus; Phytotoxicity
资金
- Natural Science Foundation of Gansu Province [18JR4RA003]
- Fundamental Research Funds for the Central Universities [lzujbky-2018-2]
Twenty meroterpenoids with diverse ring systems including five new ones (1, 2, 5, 6, and 15), together with two new (23 and 24) and two known dioxolanone-type secondary metabolites were isolated from Phyllosticta capitalensis, an endophytic fungus from Cephalotaxus fortunei Hook. Compound 1 was the first example with a 9,14-seco ring A and a five-membered ring B in guignardone derivatives. Compound 2 represented a novel guignardone derivative possessing a 5/7/6/5 ring system with CH2-7 attached to C-4 rather than C-6 in ring D. The structures of all new compounds were elucidated using spectroscopic data analyses and electronic circular dichroism comparison. The phytotoxic effects of compounds 1-24 on Lactuca sativa and Lolium perenne were evaluated. Compound 22 showed inhibition activity on the shoots growth of L. sativa and L. perenne, as well as the roots growth of L. perenne. (C) 2019 Elsevier Ltd. All rights reserved.
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