PROBLEM TO BE SOLVED: To provide novel substituted thiazolidinones, oxazolidinones, and related compounds, which are effective against glaucoma or ocular hypertension, etc.SOLUTION: The compounds are represented by the specified structural formula. [Y is a carboxyl group, an organic acid functional group, its amide or ester having up to 14 carbon atoms, or the like; A is -(CH2)6-, cis-CH2CH=CH-(CH2)3- or -CH2C≡C-(CH2)3-; G is O, S, S=O, or S(=O)2; J is H, halogen, CF3, or C1-6 alkyl; and B is an aryl or heteroaryl.]【課題】緑内障又は高眼圧症等に有効な新規置換チアゾリジノン類、オキサゾリジノン類及び関連化合物の提供。【解決手段】下記の構造式[Yは、カルボキシル基或いは、有機酸官能基又はその14個までの炭素原子を含むアミド若しくはエステル等、Aは、-(CH2)6-、シス-CH2CH=CH-(CH2)3-又は-CH2C≡C-(CH2)3-、Gは、O、S、S=O、又はS(=O)2、Jは、H、ハロゲン、CF3、又はC1-6アルキル、Bは、アリール又はヘテロアリール]で示化合物。【選択図】なし