Patent ID: 6861530

Claim:
A piperidine derivative represented by formula (I): wherein m represents an integer of 0 to 5; R 1 and R 2 independently represent a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted lower alkenyl group, a substituted or unsubstituted lower alkynyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted heterocyclic group; R 3 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; and X represents a bond or CO; or a pharmaceutically acceptable salt thereof, wherein the heterocyclic groups in R 1 , R 2 and R 3 independently represent benzopyranyl, 1,4-benzodioxanyl, 1,3-benzodioxolyl, furyl, imidazolyl, imidazothiazolyl, indolyl, piperidyl, piperazinyl, pyridyl, pyridyl N-oxide, pyrazolinyl, pyrazolyl, thiadiazolyl or thienyl.