The invention relates to compounds of formula: ##STR1## in which: R.sub.1 and R.sub.2 denote, independently of one another, a hydrogen atom or alternatively a carbamoyl group of formula: ##STR2## with R'.sub.3 denoting hydrogen or R.sub.3 ; an alkoxycarbonyl group of formula: ##STR3## or an acyl group of formula: ##STR4## in which formulae R.sub.3 denotes an alkyl, alkenyl or cycloalkyl radical; R.sub.3 can also denote an aryl or aralkyl radical; and R denotes a linear or braanched C.sub.1 -C.sub.8 alkyl radical substituted with one or more halogen atoms, and to their use for the treatment and prevention of hair loss and for stimulating its regrowth.
该发明涉及以下化合物的公式:##STR1##其中:R.sub.1和R.sub.2分别表示氢原子或选择性地表示如下公式的
氨基甲酰基团:##STR2##其中R'.sub.3表示氢或R.sub.3;一种如下公式的烷氧羰基团:##STR3##或一种如下公式的酰基团:##STR4##在这些公式中,R.sub.3表示烷基、烯烃基或环烷基基团;R.sub.3也可以表示芳基或芳基烷基基团;R表示线性或支链的C.sub.1 -C.sub.8烷基基团,其上取代有一个或多个卤原子,并且用于治疗和预防脱发以及促进头发再生。