Abstract: The chemical constituents from the liquid fermentation of Nocardiopsis sp.YIM90087 were studied.ten compounds were isolated,and their structures were determined by spectral analysis as 4hydroxybenzaldehyde(1),2hydroxy1(1Hindol3yl)ethanone(2),4hydroxybenzoic acid(3),3methoxy4methylpyridin2amin(4),4,7Bis(4methoxyphenyl)6hydroxy5methoxybenzo［d］thiazole(5),1(4methylpiperazin1yl)ethanone(6),cyclo(LproLval)(7),2(2aminoethyl)phenyl acetate(8),Nacetyltyramine(9) and 6′Hydroxy4,2′,3′,4′′tetramethoxypterphenyl(10).Compound 4 was previously reported in chemical synthesis,and was a new natural product.

Key words: Nocardiopsis sp, liquid fermentation, isolation, structural elucidation