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US4307016A Demethyl maytansinoids 失效
去甲基美登木素生物碱

Demethyl maytansinoids
摘要:
Novel demethylmaytansinoids representable by the formula: ##STR1## [wherein X is Cl or H; R.sub.1 is H or acyl group] are produced from maytansinoids by means of enzymic transformation. The demethylmaytansinoids are useful as antifungal, antiprotozoal or antitumor agents.
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