Study on Secondary Metabolites of Nocardiopsis sp.YIM 90087
The chemical constituents from the solid fermentation of Nocardiopsis sp.YIM90087 were studied.Ten compounds were isolated,and their structures were determined by spectral analysis as (3S)-3-benzylpiperazine-2,5-dione (1),(3S,6S)-3-(butan-2-yl)-6-(1-hydroxyethyl) piperazine-2,5-dione (2),(3S,6S)-3-(butan-2-yl)-6-(hydroxymethyl)piperazine-2,5-dione (3),(4S)-4-benzyl-1,3-oxazolidine-2,5-dione (4),6'-hydroxy-4,2',3',4"-tetramethoxyp-terphenyl (5),(3 S,6 S)-3-(4-hydroxybenzyl)-6-isobutylpiperazine-2,5-dione (6),(3 R,8 aS)-3-(propan-2-yl) hexahydropyrrolo [1,2-a] pyrazine-1,4-dione (7),(3S,6S)-3-isobutyl-6-methyl-piperazine-2,5-dione (8),(3S,6S)-3-benzyl-6-(1-hydroxyethyl) piperazine-2,5-dione (9),(3S,6S)-3-benzyl-6-(1-hydroxypropyl) piperazine-2,5-dione (10).Compound 4 was previously reported in chemical synthesis,and was a new natural product.