期刊
JOURNAL OF NATURAL PRODUCTS
卷 81, 期 8, 页码 1860-1868出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jnatprod.8b00345
关键词
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资金
- National Natural Science Foundation of China [21172230, 21772210, 21502204, 31270402, 41476135, 41776169]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA11030403]
- Guangdong Province Public Welfare Research and Capacity Building Project [2016A020222010]
- Pearl River S&T Nova Program of Guangzhou [201710010136]
Fourteen new polyketides classified as four phthalides, setosphalides A and B, 5-O-desmethyl- colletotrialide, and (S)-colletotrialide (1-4), three isocoumar-in derivatives, exserolides I-K (5-7), four pyrones, setosphapyrones A-D (8-11), one furanone (12), and two depsidones (13 and 14), along with 17 known polyketides were isolated from cultures of the sponge-derived fungus Setosphaeria sp. SCSIO41009. The structures and absolute Setosphaeria sp. SCSIO41009 configurations of these new compounds (1-14) were determined by spectroscopic analyses, X-ray diffraction, chiral-phase HPLC analysis, modified Mosher's method, and comparison of ECD spectra to calculations. Setosphalides A (1) and B (2) are the first examples possessing a 5,5 spiroketal skeleton in phthalide derivatives. Botryorhodines I (13) and J (14) showed moderate antifungal activities against the phytopathogenic fungi Colletotrichum asianum and Colletotrichum acutatum. Compound 18 (7-O-demethylmonocerin) exhibited potent radical scavenging activity against DPPH.
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