The present invention relates to An N-acetylglucosamine derivative represented by the following formula (1), and a hyaluronic acid production promoting agent containing the same and a skin external preparation containing the same:
wherein R
1
is a hydrogen atom or an alkyl group having 2 to 18 carbon atoms; R
2
, R
3
, and R
4
are hydrogen atoms or acyl groups having 2 to 18 carbon atoms and may be all the same or different from others; the steric structure at position 1 may be α or β; provided that R
1
, R
2
, R
3
, and R
4
must not be all hydrogen atoms.
It is intended to provide an easily available hyaluronic acid production promoting agent and a skin external preparation whereby the production of hyaluronic acid can be promoted in the skin and thus the skin can be maintained in a vital and moist state so that it is expected that the human skin can be prevented from age.
本发明涉及一种由以下式(1)表示的N-乙酰
葡萄糖氨衍
生物,以及含有该衍
生物的透明质酸生产
促进剂和皮肤外用制剂:其中R1是氢原子或具有2到18个碳原子的烷基;R2、R3和R4是氢原子或具有2到18个碳原子的酰基,可以全部相同或不同;位置1处的立体结构可以是α或β;前提是R1、R2、R3和R4不能全部是氢原子。本发明旨在提供一种容易获得的透明质酸生产
促进剂和皮肤外用制剂,从而可以促进皮肤中透明质酸的产生,使皮肤保持活力和湿润状态,从而预防人类皮肤老化。