Fused Tetracyclic or Fused Pentacyclic Dihydrodiazepinocarbazolones as PARP Inhibitors

摘要

PROBLEM TO BE SOLVED: To provide a specific fused tetracyclic or fused pentacyclic compound, and its salt, its composition, and a method for use thereof.SOLUTION: The present invention provides a compound represented by formula (I), its stereoisomer and pharmaceutically acceptable salt, where Ris H, alkyl or the like; X is C, N, O or S; m and n independently represent an integer of 0-3; t is an integer of 0-3; R-Rare H, an alkyl group, an alkenyl group, a heterocyclyl group and the like.SELECTED DRAWING: None