NOVEL AMINOPYRIDINE DERIVATIVE HAVING AURORA A-SELECTIVE INHIBITORY ACTIVITY

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, R<SUB>1</SUB> represents a hydrogen atom, F, CN or the like; R<SUB>1</SUB>' represents a hydrogen atom or an optionally substituted lower alkyl group; R<SUB>2</SUB> represents O, S, SO, SO<SUB>2</SUB> or the like;R<SUB>3</SUB> represents an optionally substituted phenyl group; X<SUB>1</SUB>, X<SUB>2</SUB> and X<SUB>3</SUB> independently represent CH, N or the like, provided that none or one of X<SUB>1</SUB>, X<SUB>2</SUB> and X<SUB>3</SUB> is N; and W represents a group represented by the following formula: , wherein W<SUB>1</SUB>, W<SUB>2</SUB> and W<SUB>3</SUB> independently represent CH, N or the like.)