PROBLEM TO BE SOLVED: To provide a compound useful as a therapeutic agent to pains or inflammation resulting from various pathologic conditions such as neurogenic pains or rheumatoid arthritis.SOLUTION: This invention relates to a compound represented by formula (I) or a salt thereof. [In the formula, R1 represents methyl or the like, R2 represents H, and Z represents formulas (A) to (D)].COPYRIGHT: (C)2013,JPO&INPIT【課題】神経因性疼痛やリウマチ性関節炎等の種々の病態に起因する疼痛や炎症に対する治療薬として有用な化合物の提供。【解決手段】式(I)の化合物又はその塩[式中、R1は、メチル等、R2は、H、Zは、下記式(A)~(D)を示す。]【選択図】なし