abstract |
[Problem] To provide a cosmetic and an external preparation for skin containing trehangerine as an active ingredient. A cosmetic and a skin external preparation containing trehangerine represented by the following formula are provided. [One of R1 to R3 represents a 2-methylbut-2-enoyl group, one of R4 to R6 represents a 2-methylbut-2-enoyl group, and the other represents a hydrogen atom. ] [Selection figure] None |