| 摘要 |
The present invention relates to specific synergistic active skin- and/or hair-lightening and/or senile keratosis-reducing (cosmetic or pharmaceutical) preparations comprising a mixture comprising or consisting of a) a tyrosinase-inhibiting amount of one or more compounds of the formula 1: wherein: R1 is hydrogen, methyl, straight-chain or branched alkyl having 2-4 C atoms, OH or halogen, R2 is hydrogen, methyl or straight-chain or branched alkyl having 2-5 C atoms, R3 is methyl or straight-chain or branched alkyl having 2-5 C atoms, and R4 and R5 are, independently of one another hydrogen, methyl, straight-chain or branched alkyl having 2-5 C atoms, OH or halogen and b) a skin- and/or hair lightening and/or senile keratosis-reducing amount of one or more compounds selected from the group consisting of (i) chelating agents, (ii) phenolic derivatives, plant extracts with an amount of phenolic derivatives and (iii) organic acid derivatives as well as uses thereof.
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