6,9-disubstituted purine derivatives and their use as cosmetics and cosmetic compositions

摘要

Certain 6,9-disubstituted purine derivatives and their pharmaceutically acceptable salts of the following general formula are provided wherein R6 and R9 are as defined in the specification. These 6,9-disubstituted purine derivatives and their pharmaceutically acceptable salts are useful in compositions for application to mammalian cells, and especially human skin cells, in order to improve the cosmetic appearance of the mammalian cells, especially human skin.