Patent ID: 7939536

Claim:
An isoxazole compound represented by formula (I) wherein: R 1 stands for hydrogen, lower alkyl, amino, lower alkylamino, di-lower alkylamino, phenyl lower alkylamino, acylamino, halogen, lower alkoxy, lower alkylthio or lower alkylsulfinyl, R 2 stands for unsubstituted aryl or heteroaryl, or aryl or heteroaryl which is substituted with 1-3 substituents selected from the group consisting of halogen, lower alkyl, lower alkoxy, lower haloalkyl, lower alkylenedioxy and benzyloxy, R 3 stands for hydrogen or lower alkyl, R 4 stands for substituted or unsubstituted phenyl, or substituted or unsubstituted heterocyclic group, and Y stands for —(CH 2 ) n —, —CO—, —CH(CH 3 )—, —O—, —NH—, n being an integer of 0-3, or a pharmaceutically acceptable salt thereof.