Patent ID: 7531668

Claim:
A compound of formula I: or pharmaceutically acceptable salt thereof, wherein: R 1 and R 2 , together with the nitrogen atom to which they bond, form a 3- to 8-membered aliphatic nitrogenous heterocyclic group optionally substituted with R 6 ; R 3a and R 3b are independently selected from a hydrogen atom and a C 1-6 alkyl group optionally substituted with R 5 ; R 4 is a hydrogen atom, a halogen atom, a C 1-6 alkyl group optionally substituted with R 5 , or a C 1-6 alkyloxy group optionally substituted with R 5 ; each R 5 is independently selected from the group consisting of a hydrogen atom, a halogen atom, a cyano group, a hydroxyl group, an amino group, a C 1-6 alkyl group optionally substituted with a fluorine atom or a hydroxyl group, a mono-C 1-6 alkylamino group, a di-C 1-6 alkylamino group, a C 1-6 alkyloxy group optionally substituted with a fluorine atom, a C 1-6 alkyloxy-C 1-6 alkyl group, a C 1-6 alkyloxycarbonyl group, a C 1-6 alkyloxycarbonylamino group, a C 1-6 alkyloxycarbonyl(C 1-6 alkyl)amino group, a C 1-6 alkylcarbonyl group, a C 1-6 alkylcarbonyloxy group, a C 1-6 alkylcarbonylamino group, a C 1-6 alkylcarbonyl(C 1-6 alkyl)amino group, a carbamoyl group, a mono-C 1-6 alkylcarbamoyl group, a di-C 1-6 alkylcarbamoyl group, a carbamoylamino group, a mono-C 1-6 alkylcarbamoylamino group, a di-C 1-6 alkylcarbamoylamino group, a mono-C 1-6 alkylcarbamoyl(C 1-6 alkyl)amino group, a di-C 1-6 alkylcarbamoyl(C 1-6 alkyl)amino group, a carbamoyloxy group, a mono-C 1-6 alkylcarbamoyloxy group, a di-C 1-6 alkylcarbamoyloxy group, a C 1-6 alkylsulfonyl group, a C 1-6 alkylsulfonylamino group, a C 1-6 alkylsulfonyl(C 1-6 alkyl)amino group, a sulfamoyl group, a mono-C 1-6 alkylsulfamoyl group, a di-C 1-6 alkylsulfamoyl group, a sulfamoylamino group, a (mono-C 1-6 alkylsulfamoyl)amino group, a (di-C 1-6 alkylsulfamoyl)amino group, a mono-C 1-6 alkylsulfamoyl(C 1-6 alkyl)amino group, a di-C 1-6 alkylsulfamoyl(C 1-6 alkyl)amino group and a C 1-6 alkylsulfinyl group; R 6 is selected from R 5 and an oxo group; X is —N—or —C(R 3C )—, and R 3C has the same meaning as that of R 3a ; Y 1 is a C 1-3 alkylene group or an oxy-C 2-3 alkylene group, and any hydrogen atom in the C 1-3 alkylene group or the oxy-C 2-3 alkylene group is optionally substituted with a C 1-4 alkyl group; or Y 2 is a C 1-4 alkylene group or an oxy-C 1-4 alkylene group, and any hydrogen atom in the C 1-4 alkylene group or the oxy-C 1-4 alkylene group is optionally substituted with a C 1-4 alkyl group; Ar 1 is a divalent group, and represents a monocyclic aromatic carbocyclic group optionally substituted with R 5 ; Ar 2 represents a 5- or 6-membered aromatic carbocyclic group optionally substituted with R 5 .