PROBLEM TO BE SOLVED: To provide a hypoglycemic agonist containing GPR-119 agonist as an active ingredient.SOLUTION: The present invention provides a compound represented by following formula (I) or salt thereof. In the formula (I), a substituent A represents phenyl, or heteroaryl having five- or six-membered ring, and a substituent B represents (a) C2-6 alkyl, C3-8 cycloalkyl, C3-8 cycloalkyl C1-6 alkyl, aryl C1-6 alkyl, or saturated heterocyclyl C1-6 alkyl, (b) -COOR31, or (c) heteroaryl having five- or six-membered ring represented by following formula (β).COPYRIGHT: (C)2014,JPO&INPIT【課題】GPR-119アゴニストを有効成分とする血糖低下作用薬の提供。【解決手段】下記式(I)で表される化合物又はその塩。[式(I)中、置換基Aは、フェニル、5若しくは6員のヘテロアリールを示し、置換基Bは、(a)C2-6アルキル、C3-8シクロアルキル、C3-8シクロアルキルC1-6アルキル、アリールC1-6アルキル又は飽和のヘテロシクリルC1-6アルキル、(b)-COOR31、(c)下記式(β)で表される5又は6員のヘテロアリールを示す。]【選択図】なし