New types of liposidomycins that inhibit bacterial peptidoglycan synthesis and are produced by Streptomyces -: II.: Isolation and structure elucidation

Various new liposidomycins were isolated from a-culture of the strain Streptomyces sp. SN-1061M by changing medium components and they were classified into four types (I similar to IV) based on their structures. They were purified by butanol extraction, silica gel and LH-20 column chromatographies, nd high performance liquid chromatography on ODS columns; Type (I) has the original structure which has sulfate and 3-methylglutaric acid moieties. Type (II) has no 3-methylglutaric acid moiety and type (III) has no sulfate moiety. Type (IV) has neither moiety. Type (III) and (IV) compounds, which have no sulfate moiety, exhibited more potent antimicrobial activity.