PROBLEM TO BE SOLVED: To provide a novel compound having a GPR40 activating action, particularly an insulin secretion promoter and an agent useful for prevention and/or therapy of diabetes, obesity, or the like.SOLUTION: The present invention provides a compound of formula (I), a salt thereof, or a solvate thereof (where n is 0 to 2； p is 0 to 4； h is 0 to 3； j is 0 to 3； k is 0 to 2； ring B is an aryl group or a heteroaryl group； X is O, S, -NR-； Jis -CRR- or -NR-； Jis -CRR- or -NR-； and R-Rare a specific group).SELECTED DRAWING: None【課題】ＧＰＲ４０活性化作用を有し、特にインスリン分泌促進剤、糖尿病、肥満等の予防及び／又は治療に有用な新規化合物の提供。【解決手段】下記式（Ｉ）で表される化合物、その塩又はそれらの溶媒和物。（ｎは０～２；ｐは０～４；ｈは０～３；ｊは０～３；ｋは０～２；環Ｂはアリール基、ヘテロアリール基；ＸはＯ、Ｓ、－ＮＲ７－；Ｊ１は－ＣＲ１１ａＲ１１ｂ－、－ＮＲ１１ｃ－；Ｊ２は－ＣＲ１２ａＲ１２ｂ－、－ＮＲ１２ｃ－；Ｒ１～Ｒ１２ｃは特定の基。）【選択図】なし
