The new antibiotic, XK-90, produced by Streptomyces sp. is active against Gram-positive and Gram-negative bacteria. The structure has been determined as N-acetyl-N'-(3-formyl-4-hydroxyphenyl)hydrazine (1) and is the second example of a naturally occurring antibiotic having the phenylhydrazine skeleton.
山东省济南市章丘区文博路2号
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