Patent ID: 8084476

Claim:
A compound of the formula (I): wherein X represents a nitrogen atom; Y represents —NR 4 , an oxygen atom or a sulfur atom; R 4 represents a hydrogen atom or an alkyl group having from 1 to 3 carbon atoms; Z represents a hydrogen atom or a halogen atom; R 1 represents an alkyl group having from 1 to 6 carbon atoms optionally substituted with an alkoxy group having from 1 to 6 carbon atoms or a cycloalkyl group having from 3 to 7 carbon atoms; a cycloalkyl group having from 3 to 7 carbon atoms optionally substituted by an alkyl group having from 1 to 3 carbon atoms; or a phenyl group optionally substituted with one or more substituents α; R 2 and R 3 independently represent a hydrogen atom or an alkyl group having from 1 to 3 carbon atoms; or R 2 and R 3 groups together from an alkylene chain having from 3 to 6 carbon atoms; and said substituent α is selected from the group consisting of halogen atoms, alkyl groups having from 1 to 4 carbon atoms, haloalkyl groups having from 1 to 4 carbon atoms, hydroxy groups, alkoxy groups having from 1 to 4 carbon atoms, haloalkoxy groups having from 1 to 4 carbon atoms, cyano groups, hydroxy alkyl groups having from 1 to 4 carbon atoms, alkoxyalkyl groups having from 1 to 4 carbon atoms in alkoxy and alkyl groups, alkylsulfonyl groups having from 1 to 4 carbon atoms, alkanoyl groups having from 2 to 5 carbon atoms, alkenyl groups having from 2 to 4 carbon atoms, alkynyl groups having from 2 to 4 carbon atoms, alkylthio groups having from 1 to 4 carbon atoms, nitro groups, amino groups, mono- or di-alkylamino groups having from 1 to 4 carbon atoms, aminosulfonyl groups, alkoxycarbonyl groups having from 1 to 4 carbon atoms, alkylsulfonylamino groups having from 1 to 4 carbon atoms, cycloalkyl groups having from 3 to 7 carbon atoms and a mono- or di-alkylaminocarbonyl groups having from 1 to 6 carbon atoms; or a pharmaceutically acceptable ester of such compound; or a pharmaceutically acceptable salt thereof.