PROBLEM TO BE SOLVED: To provide an external preparation for skin suitable for cosmetics (including quasi drugs).SOLUTION: The external preparation for skin includes compounds represented by formulas (1) and (2). In the formula (1), R1 and R2 each independently represents a 1-6C linear or branched alkyl group or a hydrogen atom R3 represents a hydrogen atom or a 1-4C linear or branched alkyl group. In the formula (2), R4 represents an aromatic group or a hydrogen atom and R5 and R6 each represents an aromatic group R7 and R8 are joined together to form a 2-8C heterocyclic ring with nitrogen.COPYRIGHT: (C)2013,JPO&INPIT【課題】化粧料(但し、医薬部外品を含む)に好適な皮膚外用剤の提供。【解決手段】式(1)及び(2)の化合物を含有する皮膚外用剤。(1)[R1及びR2は、それぞれ独立に、炭素数1~6の直鎖又は分岐のアルキル基、水素原子、R3は、水素原子、炭素数1~4の直鎖又は分岐のアルキル基。](2)[R4は芳香族基、水素原子、R5及びR6は、芳香族基。R7及びR8は互いに結合し、窒素原子と共に環形成している炭素数2~8の複素環。]【選択図】なし
