CARNITINE DERIVATIVE, SALT THEREOF, EXTERNAL SKIN PREPARATION AND COSMETIC MATERIAL

摘要

To provide novel carnitine derivatives and salts thereof that are resistant to hydrolysis in the presence of aqueous media, and also provide external skin preparations and cosmetics that are excellent in storage stability, product life, skin affinity and percutaneous absorption properties. In particular, to provide novel a-branched acyl carnitine derivatives and salts thereof, external skin preparations and cosmetics comprising specific a-branched acyl carnitine derivatives and/or salts thereof.