Patent ID: 8592580

Claim:
A compound of formula (I): wherein: Z represents a bond, a carbonyl group, or a methylene group optionally substituted by one or two groups chosen from a C 1-6 alkyl group, a hydroxyl group, and a C 1-6 alkoxy group; R1 represents a 4-pyridine ring; R2 represents a hydrogen atom or a C 1-6 alkyl; R3 represents a hydrogen atom or a C 1-6 alkyl group; or R2 and R3 may form together a 6 membered cycle with the nitrogens caring R2 and R3 optionally substituted by 1 to 4 substituents selected from a C 1-6 alkyl group; R4 represents: a phenyl ring, this ring being optionally substituted by 1 to 4 substituents selected from a C 1-6 alkyl group, a halogen atom, a C 1-2 perhalogenated alkyl group, a C 1-3 halogenated alkyl group, a hydroxyl group, a C 1-6 alkoxy group, a C 1-2 perhalogenated alkoxy group, a C 1-6 alkylsulfonyl group, a nitro, a cyano, an amino, a C 1-6 monoalkylamino group, a C 2-12 dialkylamino group, an acetoxy group, or an aminosulfonyl group; and n represents 0 to 2; or an acid addition salt thereof.