A compound represented by the following general formula (I): [wherein R 1 represents hydrogen atom or a C 16 alkyl group, A and B represent -(CH 2 ) 2 -, -(CH 2 ) 3 - or -(CH 2 ) 4 -, X represents -N(R 2 )- (R 2 represents hydrogen atom or a C 1-6 alkyl group), -CO-, -C(=N-R 3 )- (R 3 represents hydrogen atom or a C 1-6 alkyl group), or - C(=C(R 4 )(R 5 ))- (R 4 and R 5 independently represent hydrogen atom or a C 1-6 alkyl group), and Ar represents an aryldiyl group or a heteroaryldiyl group], which has an action of controlling physiological activities of retinoids and useful as an active ingredient of a medicament.
