N-SUBSTITUTED-N-(4-PIPERIDINYL) AMIDE DERIVATIVE

摘要

A compound represented by the general formula (I) below or a salt thereof is used as an analgesic. (I) (In the formula, R<SUP>1</SUP> represents an alkyl group having 1-6 carbon atoms, an optionally substituted 5- or 6-membered heterocyclic group or the like; R<SUP>2</SUP> represents an acylamino group having 1-6 carbon atoms, an alkyl(thiocarbonyl)amino group having 2-6 carbon atoms, an ureide group, a thioureide group or the like, and the substitution position of R<SUP>2</SUP> is an ortho- or meta-position; R<SUP>3</SUP> represents a hydrogen atom or an alkoxycarbonyl group having 2-8 carbon atoms or the like; R<SUP>4</SUP> represents an optionally substituted phenyl group or a 5- or 6-membered heterocyclic group; R<SUP>5</SUP> represents a hydrogen atom or the like; R<SUP>6</SUP> represents a hydrogen atom or the like; R<SUP>7</SUP> represents a hydrogen atom or a methyl group; and m represents 1 or 2.)