Journal
JOURNAL OF NATURAL PRODUCTS
Volume 73, Issue 5, Pages 920-924Publisher
AMER CHEMICAL SOC
DOI: 10.1021/np100071z
Keywords
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Funding
- National Natural Science Foundation of China [30925039]
- Ministry of Science and Technology of China [2009CB522300, 2008ZX09401-05, 2009ZX09302-004]
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Six new polyketides including four oxepinochromenones, conioxepinols A-D (1-4), one furochromenone, coniofurol A (5), and one xanthone, conioxanthone A (6), have been isolated from the crude extract of the endolichenic fungus Coniochaeta sp. The absolute configurations of C-7 in 1 and the 7,8-diol moiety in 3 were assigned using the modified Mosher's and Snatzke's method, respectively, whereas that of C-8 in 5 was deduced via the circular dichroism data of the ([Rh(2)(OCOCF(3))(4)]) complex. Compounds 2-4 showed modest cytotoxicity against a small panel of human tumor cell lines.
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