The invention relates to the derivatives of general formula (I)in which: R1is: a phenyl group or a naphthyl group, it being possible for these two groups to be optionally substituted; R2and R3are, independently of one another, a hydrogen atom or a (C1-C6)alkyl, (C3-C7)cycloalkyl or (C3-C7)cycloalkyl(C1-C3)alkylene group, which is optionally substituted; an optionally substituted aryl group; R4is: a hydrogen atom or a (C1-C6)alkyl, (C3-C7)cycloalkyl or (C3-C7)cyclo-alkyl(C1-C3)alkylene group, which is optionally substituted; an aryl group optionally substituted with one or more substituents, in the form of a base or of an addition salt with an acid.本發明係關於通式(I)之衍生物:其中:R1係:苯基基團或萘基基團,該兩個基團可能視情況經取代;R2及R3彼此獨立為氫原子或(C-C6)烷基、(C3-C7)環烷基或(C3-C7)環烷基(C1-C3)伸烷基,其視情況經取代;視情況經取代之芳基;R4係:氫原子或(C1-C6)烷基、(C3-C7)環烷基或(C3-C7)環烷基(C1-C3)伸烷基,其視情況經取代;視情況經一或多個取代基取代之芳基基團,呈鹼或與酸形成之加成鹽之形式。本發明亦係關於其製備方法及治療用途。