A new minor diketopiperazine from the sponge-derived fungus Simplicillium sp. YZ-11
2015
Chemical investigation of the cultures of a sponge-derived fungus Simplicillium sp. YZ-11 led to the isolation of a new minor diketopiperazine alkaloid cyclo-(2-hydroxy-Pro-Gly) (1) and a natural lactone (S)-dihydro-5-[(S)- hydroxyphenylmethyl]-2(3H)-furanone (2), together with five known ergostane-type sterols (3-7). Their structures were established based on extensive spectroscopic methods (H-1 and C-13 NMR, H-1-H-1 COSY, HSQC and HMBC) and optical rotation analysis.
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