Patent ID: 6992085

Claim:
A compound selected from those of formula (I): wherein: Ra represents linear or branched (C 1 –C 6 )alkylene, Y represents aryl, X represents a group selected from W 1 , —C(W 1 )—W 2 —, —W 2 —C(W 1 )—, —W 2 —C(W 1 )W 2 —, and —W 2 —Ra—, wherein R a has the same meaning as R a , and wherein: W 1 represents oxygen, sulphur, or a group of formula —NR 2 wherein R 2 represents hydrogen, linear or branched (C 1 –C 6 )-alkyl, aryl, aryl-(C 1 –C 6 )alkyl in which the alkyl moiety is linear or branched, and linear or branched (C 1 –C 6 )acyl, and W 2 represents a group as defined for W 1 , or X represents —CH(OR 1 ) wherein R 1 is selected from hydrogen or linear or branched (C 1 –C 6 )alkyl, provided that —W 2 —C(W 1 )— is not O—C(O)—, its enantiomers, diastereoisomers, and addition salts thereof with a pharmaceutically acceptable acid or base, with the proviso that the compound may not be: 2-octahydro-2H-pyrido[1,2-a]pyrazin-2-yl-1-phenylethanol, 3-octahydro-2H-pyrido[1,2-a]pyrazin-2-ylpropyl-3,4,5-trimethoxybenzoate, and 2-octahydro-2H-pyrido[1,2-a]pyrazin-2-ylethyl-3,4,5-trimethoxybenzoate, it also being understood that: “aryl group” is a monocyclic or bicyclic aromatic system, having from 5 to 10 carbon atoms, optionally substituted by one or more identical or different groups each independently of the others selected from halogen, nitro, cyano, hydroxy, linear or branched (C 1 –C 6 )alkoxy, aryloxy, aryl-(C 1 –C 6 )-alkoxy in which the alkoxy moiety is linear or branched, linear or branched (C 1 –C 6 )alkyl, linear or branched (C 2 –C 6 )alkenyl, linear or branched (C 2 –C 6 )alkynyl, linear or branched trihalo-(C 1 –C 6 )alkyl, carboxy, linear or branched (C 1 –C 6 )alkoxy-carbonyl, linear or branched (C 1 –C 6 )acyl, linear or branched (C 1 –C 6 )acyloxy, —SH, linear or branched (C 1 –C 6 )alkylthio, methylenedioxy, ethylenedioxy, —C(CH 3 )═N—OH, and amino optionally substituted by one or two identical or different groups each independently of the other selected from linear or branched (C 1 –C 6 )alkyl, aryl, aryl-(C 1 –C 6 )alkyl in which the alkyl moiety is linear or branched, and linear or branched (C 1 –C 6 )acyl.