| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an external composition for skin having prophylaxis and ameliorating actions on photo-aging or prophylaxis and ameliorating actions on wrinkles. <P>SOLUTION: The external composition for skin contains a compound represented by formula (I) (wherein, R<SB>1</SB>is a 2-25C alkyl group; X is -CO-NH- or the like; Y is a 1-4C alkylene group; R<SB>2</SB>is a hydrogen atom or the like; R<SB>3</SB>is a 1-4C alkyl group; R<SB>2</SB>and R<SB>3</SB>may each be a 1-4C alkyl group which is same or different) or a salt thereof, and/or a quaternary ammonium salt having an R<SB>1</SB>-X-Y group similar to formula (I), further the N group of formula (I) that is an ammonium group, and R<SB>4</SB>, R<SB>5</SB>and R<SB>6</SB>in which the same or a different 1-4C alkyl group is substituted, and having A<SP>-</SP>as a counterion. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
