Patent ID: 7279486

Claim:
A compound of the following formula (I) or a pharmaceutically acceptable salt thereof, wherein R 1 and R 2 independently represent a hydrogen atom, a halogen atom or an alkyl group having from 1 to 3 carbon atoms; R 3 represents an aryl group having from 6 to 10 ring atoms or a heteroaryl group and said heteroaryl group is a 5- to 10-membered heteroaromatic group containing from 1 to 3 heteroatoms selected from an oxygen atom, a sulfur atom and a nitrogen atom; said aryl group and heteroaryl group are optionally substituted by 1 to 3 groups selected from a halogen atom, a hydroxy group, an alkyl group having from 1 to 3 carbon atoms, an alkoxy group having from 1 to 3 carbon atoms, an alkyl group having from 1 to 6 carbon atoms interrupted by an oxygen atom, a hydroxyalkyl group having from 1 to 3 carbon atoms, an amino group, a mono-or di-alkylamino group having from 1 to 3 carbon atoms, an aminocarbonyl group, a mono- or di-alkylaminocarbonyl group having from 1 to 3 carbon atoms in each alkyl group, an alkanoylamino group having from 1 to 3 carbon atoms and an alkylsulfonylamino group having from 1 to 3 carbon atoms; —X—Y— represents a group of the formula —N(R 4 )C(═O)—, —C(═O)N(R 4 )—, —N(R 4 )CH 2 —, —CH 2 N(R 4 )—, —N(R 4 )SO 2 —, —SO 2 N(R 4 )—, —CH 2 CH 2 —, —CH═CH—, —CH(CH 2 OH)CH 2 —, —CH 2 CH(CH 2 OH)—, —CH 2 CH(OH)—, —CH(OH)CH 2 —, —C(R 4 )(R 5 )—O— or —O—C(R 4 )(R 5 )—; R 4 represents a hydrogen atom or an alkyl group having from 1 to 3 carbon atoms; R 5 represents a hydrogen atom, an alkyl group having from 1 to 3 carbon atoms or a hydroxyalkyl group having from 1 to 3 carbon atoms; and n represents an integer 0, 1 or 2.