A new antitumor antibiotic, 3''-demethylchartreusin was isolated from the culture broth of Streptomyces chartreusis, as a minor component of crude chartreusin. It is structurally related to chartreusin, containing same aglycone of chartreusin, but different sugar moieties. 3''-Demethylchartreusin exhibits some potent inhibitory activities against murine tumors.
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Aoyama et al. (1992) studied this question.
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