Novel maytansinoids of the formula:
wherein Y is H or Cl, and R is C2-15alkyl, phenyl-C1-4alkyl, pyridyl-C1-4alkyl, imidazolyl-C1-4alkyl, indolyl-C1-4alkyl, furyl-C1-4alkyl or thienyl-C1-4alkyl, any of said groups being substituted by hydroxyl, halogen or C1-5alkanoyloxy at its a- and/or β-position,
have antimitotic, antitumor and antimicrobial activities.
式中 Y 为 H 或 Cl,R 为 C2-15烷基、苯基-C1-4烷基、
吡啶基-C1-4烷基、
咪唑基-C1-4烷基、
吲哚基-C1-4烷基、
呋喃基-C1-4烷基或
噻吩基-C1-4烷基,其中任一基团的 a 位和/或 β 位被羟基、卤素或 C1-5 烷酰氧基取代的新型 maytansinoids 具有抗嗜血杆菌、抗肿瘤和抗菌活性。