A novel bicyclic compound having an HSP90 inhibitory effect and a carcinostatic effect. A pharmaceutical agent based on the HSP90 inhibitory effect and useful in the prevention and/or treatment of a disease involving HSP90, particularly cancer. The compound has a general formula (I) or is a salt thereof wherein at least one of X1, X2, X3, and X4 represents N or N-oxide and the rest thereof are each independently C—R2; any one or two of Y1, Y2, Y3, and Y4 represent C—R4 and the rest thereof are each independently CH or N; R1 represents an optionally substituted monocyclic or bicyclic unsaturated heterocyclic group having 1 to 4 heteroatoms selected from N, S, and O; R2 represents a hydrogen atom, an optionally substituted alkyl group having 1 to 6 carbon atoms etc.; R3 represents a hydrogen atom, —CO—R5 etc.
一种具有
HSP90抑制作用和抗癌作用的新型
双环化合物。基于
HSP90抑制作用的制药剂,可用于预防和/或治疗涉及
HSP90的疾病,特别是癌症。该化合物具有一般式(I)或其盐,其中X1、X2、X3和X4中至少有一个代表N或N-
氧化物,其余各自独立地为C—R2;Y1、Y2、Y3和Y4中的任意一个或两个代表C—R4,其余各自独立地为CH或N;R1代表具有1到4个异原子(选自N、S和O)的可选取代单环或双环不饱和杂环基;R2代表
氢原子、具有1到6个
碳原子的可选取代烷基等;R3代表
氢原子、—CO—R5等。