The invention relates to a compound of general formula (I) wherein: R1 is a hydrogen atom or a C1 to C4 alkyl radical; R2 is a C1 to C4 hydroxyl or alkoxyl radical; and R3 and R4 are independently a hydrogen atom or a C1 à C4 alkyl radical; and the enantiomers and mixtures of enantiomers thereof, especially in a racemic form.
该发明涉及一种通式(I)的化合物,其中:R1是
氢原子或C1至C4烷基基团;R2是C1至C4羟基或烷
氧基基团;R3和R4分别是
氢原子或C1至C4烷基基团;以及其对映体和对映体混合物,特别是其外消旋形式。