Patent ID: 7354925

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 a hydrogen atom, a cycloalkyl group having from 3 to 6 carbon atoms, a tetrahydrofuranyl group, a tetrahydropyranyl group, or an alkyl group having from 1 to 6 carbon atoms, which alkyl group is optionally substituted by 1 to 3 groups selected from a cyano group, a halogen atom, a hydroxy group, an alkoxy group having from 1 to 3 carbon atoms, an oxo group, an amino group and a mono- or di-alkylamino group having from 1 to 3 carbon atoms; R 4 represents a hydrogen atom or an alkyl group having from 1 to 3 carbon atoms; or represents one of the following optionally substituted by 1 to 2 groups selected from an oxo group, a hydroxy group, a hydroxyalkyl 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 or an alkoxyalkyl group having a total of from 2 to 6 carbon atoms; R 5 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 hetero aromatic group containing from 1 to 3 hetero atoms selected from a 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; R 6 represents a hydrogen atom, an alkyl group having from 1 to 3 carbon atoms, an alkanoyl group having from 1 to 3 carbon atoms or an alkylsulfonyl group having from 1 to 3 carbon atoms; â€”Xâ€”Yâ€” represents a group of the formula â€”N(R 7 )C(â•O)â€”, â€”C(â•O)N(R 7 )â€”, â€”N(R 7 )CH 2 â€”, â€”CH 2 N(R 7 )â€”, â€”N(R 7 )SO 2 â€”, â€”SO 2 N(R 7 )â€”, â€”CH 2 CH 2 â€”, â€”CHâ•CHâ€”, â€”CH(CH 2 OH)CH 2 â€”, â€”CH 2 CH(CH 2 OH)â€”, â€”CH 2 CH(OH)â€”, â€”CH(OH)CH 2 â€”, â€”C(R 7 )(R 8 )â€”Oâ€” or â€”Oâ€”C(R 7 )(R 8 )â€” R 7 represents a hydrogen atom or an alkyl group having from 1 to 3 carbon atoms; R 8 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; n represents an integer 0, 1 or 2.