Patent ID: 8436192

Claim:
A compound of formula (I): in which: R 1 forms with R 3 and the nitrogen and carbon atoms to which they are respectively attached, a heterocycle with 4 to 7 members, the heterocycle being optionally substituted in the α position of the nitrogen atom by one or two R a and R b radicals which can be independently of the other a hydrogen atom or a linear or branched alkyl containing 1 to 4 carbon atoms; and R 2 is a hydrogen atom or represents a —CO—O—CHR 4 —OCOR 5 radical for which R 4 is a hydrogen atom or a linear or branched alkyl radical containing 1 to 4 carbon atoms, and R 5 is an alkyl radical, or R 2 represents an alkyl radical in a linear or branched chain containing 1 to 4 carbon atoms, or a linear or branched alkyl radical containing 2 to 4 carbon atoms substituted by hydroxy, alkoxy, alkylthio, amino, alkylamino, or dialkylamino, wherein the alkyl parts of the dialylamino can form with the nitrogen atom to which they are attached, a heterocycle with 5 or 6 members, the substituted 2 to 4C alkyl radical comprising at least 2 carbon atoms between the nitrogen atom bearing R 2 and the substituent; the alkyl radicals being, unless specified otherwise, linear or branched and containing 1 to 7 carbon atoms; in its R or S forms or their mixtures, as well as its pharmaceutically acceptable salts, if any.