Retinoid-like activity is exhibited by compounds of the formula ##STR1## where X is NR'; where R' is hydrogen or lower alkyl; R.sub.1, R.sub.2 and R.sub.3 are hydrogen or lower alkyl; R.sub.4 and R.sub.5 are hydrogen or lower alkyl with the proviso that R.sub.4 and R.sub.5 cannot both be hydrogen, A is thienyl, furyl; n is 0-5, and B is H, --COOH or a pharmaceutically acceptable salt, ester or amide thereof, --CH.sub.2 OH or an ether or ester derivative, or --CHO or an acetal derivative, or --COR.sub.1 or a ketal derivative where R.sub.1 is --(CH.sub.2).sub.m CH.sub.3 where m is 0-4, or a pharmaceutically acceptable salt thereof.
化合物的公式为##STR1##,其中X为NR',R'为氢或低碳基;R.sub.1、R.sub.2和R.sub.3为氢或低碳基;R.sub.4和R.sub.5为氢或低碳基,但是R.sub.4和R.sub.5不能同时为氢;A为
噻吩基、
呋喃基;n为0-5,B为H、--COOH或其药学上可接受的盐、酯或酰胺、--CH.sub.2 OH或其醚或酯衍
生物、--CHO或其
缩醛衍
生物、或--COR.sub.1或其
缩酮衍
生物,其中R.sub.1为--(CH.sub.2).sub.m CH.sub.3,m为0-4,或其药学上可接受的盐。