NOVEL AMINOPYRIDINE DERIVATIVES HAVING AURORA A SELECTIVE INHIBITORY ACTION

摘要

Disclosed is a compound represented by the general formula [I] below or a pharmaceutically acceptable salt or ester thereof. (I) (In the formula, R1 represents a hydrogen atom, F, CN or the like; R1' represents a hydrogen ato m or an optionally substituted lower alkyl group; R2 represents O, S, SO, SO 2 or the like;R3 represents an optionally substituted phenyl group; X1, X2 a nd X3 independently represent CH, N or the like, provided that none or one o f X1, X2 and X3 is N; and W represents a group represented by the following formula: , wherein W1, W2 and W3 independently represent CH, N or the like.)