| polyketides from the ascomycete fungus leptosphaeria sp. | 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)] co ... | 2010 | 20408555 |