| abstract |
PROBLEM TO BE SOLVED: To provide a drug used for improving the moisturizing property of skin or mucous membrane and applied to skin or mucous membrane. SOLUTION: The following formula (I): Wherein X is selected from —O—, —S— and —NR— R represents a hydrogen atom or a linear or branched, saturated or unsaturated C 1 -C 6 hydrocarbon-based group, R 1 represents a hydrogen atom, R 2 is selected from a linear or branched, saturated or unsaturated C 1 -C 40 hydrocarbon-based group or the like, and R 2 is a hydrogen atom, —NH 2, -OH, -SH, -CHOHCH 3 , is selected from -CONH 2, etc., n represents the molecular weight of the polyamino acid derivative is 200 The average number of repeating units exceeding 1 so that に な る 200,000 is obtained]. |