Journal
JOURNAL OF NATURAL PRODUCTS
Volume 73, Issue 5, Pages 905-910Publisher
AMER CHEMICAL SOC
DOI: 10.1021/np1000335
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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The new polyketides leptosphaerins A-G (1-7) and the known compounds monodictysin B (8), 2-(2,6-dihydroxybenzoyl)-3-hydroxy-5-methylbenzoic acid (9), and 2-(2,6-dihydroxy-4-methylbenzoyl)-6-hydroxybenzoic acid (10) have been isolated from solid cultures of the ascomycete fungus Leptosphaeria sp. The absolute configurations of compounds 1, 2, and 6 were assigned using the modified Mosher method. whereas that of C-2 in 3 was determined via the circular dichroism data of the [Rh(2)(OCOCF(3))(4)] complex. Compound 7 showed antifungal activity against Aspergillus flavus.
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