Patent ID: 8063220

Claim:
A compound having the formula (I): wherein Ar 1 represents an optionally substituted phenyl group, wherein the phenyl group is optionally substituted with one to three substituents selected from fluoro, chloro, cyano, methyl, and methoxy; Ar 2 represents a substituted phenyl group, wherein the substituted phenyl group is substituted with one to three substituents selected from fluoro, chloro, cyano, methyl, or methoxy; R 1 , R 2 , R 3 and R 4 represent independently a substituent selected from hydrogen, halogen, cyano, alkyl, alkoxy, hydroxy, trifluoromethyl, amino, alkylamino, dialkylamino, aminomethyl, alkylaminomethyl, and dialkylaminomethyl; or salts thereof.