abstract |
Disclosed are a compound useful as a skin whitening agent, which has excellent melanin production inhibitory activity, and an external preparation for the skin containing the compound. A skin whitening agent of the present invention contains a compound represented by general formula (1) or a pharmacologically acceptable salt thereof as an active ingredient. (In the formula, R1, R2 and R2' independently represent a C1-3 alkyl; Y represents S or O; and p represents an integer of 0-3. When p is 2 or 3, R1's may be same as or different from each other.) |