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 ##STR2## 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: ##STR3## [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: ##STR4## (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。具有以下式子所代表的融合环的
羧酸衍
生物或其药理学上可接受的盐:##STR1## 其中符号##STR2##代表单键或双键;X、Y、Z、P、Q、U、V和W分别是由式子表示的基团:--O--或--S--,或由式子表示的基团:##STR3## [其中R.sup.k(k:1至8)是氢、卤代、可选择取代的较低烷基或类似物,R.sup.7和R.sup.8中的任一者是由式子表示的基团:##STR4##(其中A和B各自独立地是可选择取代的
芳香烃环或可选择取代的不饱和杂环;D是可选择保护的羧基)}。