| abstract |
An external skin care preparation comprising a compound represented by the following general formula (I) or (II), or a salt thereof: ##STR1## wherein R 1 means an aliphatic hydrocarbon group having 9-25 carbon atoms, A and B denote specific groups respectively, R 6 and R 7 are individually an aliphatic hydrocarbon group having 10-26 carbon atoms, and R 8 denotes a group --CH 2 CH 2 OH, --CH 2 COOH or --COCH 3 . |