Patent ID: 8153658

Claim:
A piperidine derivative represented by general formula (I) or a pharmaceutically acceptable salt thereof: wherein: X: a single bond; Y: —CH 2 —; L: a single bond, *—C(O)—, *—OC(O)—, or *—N(R 0 C(O)—, wherein * represents the bonding to R 1 ; R 0 : —H or lower alkyl; R 1 : —H, or C 1-12 alkyl, lower alkenyl, cycloalkyl, cycloalkenyl, aryl or a hetero ring group, each of which may be substituted; R 2 : phenyl which may be substituted; R 3 : aryl or heteroaryl which may be respectively substituted; R 4 : methyl.