The invention relates to a stereospecific derivative of formula: ##STR1## in which R is hydrogen or a C.sub.1 -C.sub.4 thioalkyl. The invention also relates to the use of these compounds for the manufacture of stereospecific retinal or retinoic acid, as well as to a process for preparing the retinoids of formula (I). The invention finally relates to a cosmetic or pharmaceutcial composition which contains at least one compound of formula (I) in a suitable vehicle; the pharmaceutical composition according to the invention may be used for treating dermatological, rheumatic, respiratory or ophthalmological conditions.
该发明涉及一种具有以下结构的立体特异性衍
生物:##STR1##其中R为氢或C.sub.1-C.sub.4
硫代烷基。该发明还涉及利用这些化合物制备立体特异性
视黄醛或
视黄酸,以及制备式(I)的
视黄醇的方法。最后,该发明涉及一种化妆品或药用组合物,其中至少含有一种式(I)的化合物在适当的载体中;根据该发明的药用组合物可用于治疗皮肤病、风湿病、呼吸道疾病或眼科疾病。