The present invention provides a medicament exhibiting excellent retinoic acid receptor agonism. A Carboxylic acid derivative having a fused ring which is represented by the following formula or a pharmacologically acceptable salt thereof: ##STR1## wherein the symbol ----- represents a single bond or a double bond; X, Y, Z, P, Q, U, V and W are each a group represented by the formula: --O-- or --S--, or a group represented by the formula: ##STR2## [wherein R.sup.k (k:1 to 8) is hydrogen, halogeno, optionally substituted lower alkyl or the like, with either of R.sup.7 and R.sup.8 being a group represented by the formula: ##STR3## (wherein A and B are each independently an optionally substituted aromatic hydrocarbon ring or an optionally substituted unsaturated heterocycle; and D is optionally protected carboxyl)]}.
本发明提供了一种表现出优异的
视黄酸受体激动作用的药物。该药物为以下式子表示的融合环的
羧酸衍
生物或其药理学上可接受的盐: ##STR1## 其中符号-----表示单键或双键;X、Y、Z、P、Q、U、V和W是由以下式子表示的基团:--O--或--S--,或由以下式子表示的基团: ##STR2## [其中R.sup.k(k:1到8)是氢、卤素、可选择取代的低级烷基或类似物,其中R.sup.7和R.sup.8中的任意一个为由以下式子表示的基团: ##STR3## (其中A和B各自独立地为可选择取代的芳香族碳环或可选择取代的不饱和杂环;D为可选择保护的羧基)]。