Patent ID: 7714009

Claim:
A compound represented by the formula (I): wherein, ring A is a 5-membered ring represented by the formula (A′): wherein X is a carbon and X 1 is —NR 5 — (wherein R 5 is a C 1-4 alkyl); R 1 is (1) an amino substituted by two substituents selected from an optionally substituted C 1-4 alkyl, an optionally substituted phenyl and an optionally substituted pyridyl, or (2) an optionally substituted cyclic amino, provided that the amino nitrogen of said cyclic amino has no carbonyl adjacent to the nitrogen; R 2 is an optionally substituted phenyl or an optionally substituted pyridyl; Y 1 , Y 2 and Y 3 are each methyne optionally substituted by a halogen; W is a bond; and or a salt thereof.