| abstract |
A 5-membered heteroaromatic ring compound represented by the formula [I] n n nwherein V is CH or N; W is S or O; R 1 and R 2 are each H etc.; X is —N(R 4 )—, —O—, —S—, —SO 2 —N(R 5 )—, —CO—N(R 7 )— etc.; L is n n nwherein R 20 , R 21 , R 22 and R 25 are each H etc.; E is aryl or heteroaromatic ring group; R is —COOH etc.; B is aryl etc.; R 3 is H etc.; Y is —C(R 13 )(R 14 )—N(R 12 )—C(R 13 )(R 14 )—O—, —N(R 11 )—, —O— etc.; A is alkylene; and Z is aryl etc., a prodrug thereof and a pharmaceutically acceptable salt thereof. The compound [I] has a superior protein tyrosine phosphatase 1B inhibitory activity and is useful as a therapeutic agent for diabetes, diabetic complications, hyperlipidemia, obesity and the like. |