Abstract
Chemical examination of an actinomycete strain Streptomyces malaysiensis DSM 4137 derived from a soil sample derived isolate Streptomyces sp. DSM 3816, yielded a new C2 -asymmetric elaiophylin derivative efomycine U (1) and a known analogue halichoblelide D (2). These structures were unambiguously elucidated on the basis of extensive NMR spectroscopic and mass spectrometric analyses. All compounds isolated were subjected to antimicrobial, cytotoxic and immnosuppressive activities evaluation.
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