1. The compounds of formula (I): in which: - R represents a group C-alkyl, C-cycloalkyl, C-alkyloxy, -S (O) -C-alkyl, C-fluoroalkyl, C-fluoroalkyloxy, - (CH) -C -cycloalkyl, C-alkyl-OH, - (CH) -C-alkyloxy, - (CH) -C-fluoroalkyl, - (CH) -O-C-fluoroalkyl, COR, CN, NO, NRR, halogen or phenyl or a heteroaryl group containing either a) from 1 to 4 nitrogen atoms, or b) an oxygen or sulfur atom and 1 or 2 nitrogen atoms； these phenyl and heteroaryl groups may possibly be substituted with one, two or three R groups, the same or different； - R represents a C-alkyl, C-cycloalkyl, C-alkyloxy, -S (O) -C-alkyl, C- group fluoroalkyl, C-fluoroalkyloxy, - (CH) -C-cycloalkyl, C-alkyl-OH, - (CH) -C-alkyloxy, - (CH) -C-fluoroalkyl, - (CH) -O-C-fluoroalkyl, COR, CN, NO, NRR, hydrogen, halogen or a phenyl or heteroaryl group containing either a) from 1 to 4 nitrogen atoms, or b) an oxygen or sulfur atom and 1 or 2 nitrogen atoms； these phenyl and heteroaryl groups may possibly be substituted by one, two or three R groups, identical or different； - R and R, identical or different, represent a hydrogen atom or a group C-alkyl, C-cycloalkyl, C-fluoroalkyl, - ( CH) -C-cycloalkyl, C-alkyl-OH, - (CH) -C-alkyloxy, - (CH) -C-cycloalkyl, - (CH) -C-fluoroalkyl or - (CH) -O-C-fluoroalkyl ； optionally, the R and R groups can form, with the carbon atom that carries them, a C-cycloalkyl group or a heterocycle such as tetrahydrofuran, tetrahydropyran, tetrahydrothiopyran, tetrahydro-1-hydroxythiopyran or tetrahydro-1,1-dioxithiopyrano； R, R, R, R, identical or different, are either a hydrogen atom or a C-alkyl, C-cycloalkyl, C-alkyloxy, -S (O) -C-alkyl group, C-fluoroalkyl, C-fluoroalkyloxy, - (CH) -C-cycloalkyl, C-alkyl-OH, - (CH) -C-alkyloxy, - (CH) -C-fluoroalkyl, - (CH) -O-C- fluoroalkyl, COR, CN, NRR or halogen, or fe1. Соединения формулы (I):в которой:- Rобозначает группу С-алкил, С-циклоалкил, С-алкилокси, -S(O)-С-алкил, С-фторалкил, С-фторалкилокси, -(CH)-С-циклоалкил, С-алкил-ОН, -(CH)-С-алк
