发明授权
US5665778A Ceramides, process for their preparation and their applications in cosmetics and in dermopharmacy 失效
神经酰胺,其制备方法及其在化妆品和皮肤用药中的应用

Ceramides, process for their preparation and their applications in
cosmetics and in dermopharmacy
摘要:
The ceramides according to the invention are compounds corresponding to the formula: ##STR1## in which: R.sub.1 is a C.sub.11 to C.sub.21 alkyl or alkenyl radical;R.sub.2 is a linear or branched C.sub.1 to C.sub.29 hydroxyalkyl radical or a C.sub.7 to C.sub.29 hydroxyaralkyl radical, these compounds being in the form of a racemic mixture of the erythro and threo diastereoisomers for the aminodiol part ##STR2## in erythro:threo ratios of from 85:15 to 20:80. Application to cosmetic and dermopharmaceutical compositions.
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