Patent ID: 7825155

Claim:
A compound of the formula (1): wherein R 3 is hydrogen, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted saturated heterocycle, halogen, cyano, nitro, carboxy, hydroxyl, optionally substituted amino, optionally substituted alkoxy, optionally substituted alkanoyl, optionally substituted alkoxycarbonyl, optionally substituted sulfamoyl, optionally substituted carbamoyl, optionally substituted ureido, optionally substituted alkylthio, optionally substituted alkylsulfinyl, optionally substituted alkylsulfonyl, optionally substituted alkylsulfonylamino, optionally substituted arylsulfonylamino, or optionally substituted alkanoylamino; X is hydrogen, hydroxyl, halogen, C 1 -C 4 alkoxy, or C 1 -C 4 alkanoyloxy optionally substituted by fluorine; W 1 and W 2 are each independently a single bond or methylene; R 7 and R 8 are each independently hydrogen, optionally substituted alkyl or optionally substituted cycloalkyl, or R 7 and R 8 are combined together with the adjacent nitrogen atom to form optionally substituted saturated heterocycle; Ar is optionally substituted aryl or optionally substituted heteroaryl; or a pharmaceutically acceptable salt thereof.