| 摘要 |
The present invention concerns compounds of the general formula (l) wherein X is selected from the group formed by O or S and R is an aliphatic group with 2 to 23 atoms of linear or branched, saturated or unsaturated carbon (Cto C), or a cyclical group, and which can contain substitutes selected from the group formed by hydroxy, alcoxy, amino, carboxyle, ciano, nitro, alkylsulphonyle or atoms of halogen, a method for preparation thereof, cosmetic or pharmaceutical compositions which contain them and use thereof for treatment, care and/or cleaning of the skin, hair and/or nails, preferably those conditions, disorders or pathologies of the skin, hair and/or nails requiring regulation of melanogenesis. |
