Abstract

AbstractSeveral previously undescribed metabolites related to lankamycin have been isolated from fermentation broths of the lankamycin‐producing organism Streptomyces violaceoniger. Two of these metabolites, of weak antibacterical activity, have been characterized as 15‐O‐(α‐L‐4‐O‐acetyl‐arcanosyl)‐lankamycin and 15‐deoxy‐15‐oxo‐lankamycin. The latter antibiotic is prepared in high yield by Jones oxidation of lankamycin.

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