Geldanamycin derivatives the following formula ##STR1## wherein R.sup.1 represents a saturated alkylamino which should have at least two carbon atoms, an unsaturated alkylamino, a substituted lower alkylamino, cycloalkylamino, pyrrolidino or aralkylamino group or methoxy group; R.sup.2 represents hydrogen atom, a halogen atom or a lower mono or dialkylamino; when R.sup.1 is methoxy group, R.sup.2 is a halogen atom or lower alkylamino group, or ##STR2## and Geldanamycin derivative is 8,9-epoxy-Geldanamycin. The compounds are effective as antitumor drugs.
Geldanamycin衍
生物的
化学式如下:##STR1##其中,R.sup.1代表饱和的烷基
氨基,其应至少含有两个碳原子,不饱和的烷基
氨基,取代的低烷基
氨基,环烷基
氨基,
吡咯烷基或芳基烷基
氨基团或甲氧基团;R.sup.2代表氢原子,卤原子或低单或二烷基
氨基;当R.sup.1为甲氧基团时,R.sup.2为卤原子或低烷基
氨基团,或##STR2##Geldanamycin衍
生物是8,9-环氧基Geldanamycin。这些化合物对抗肿瘤有效。