| abstract |
The present invention provides a novel piperidine compound of the formula ~I ~: wherein Ring A represents an optionally substituted benzene ring, Ring B represents an optionally substituted benzene ring, R1 represents an optional ly substituted alkyl group, an optionally substituted hydroxyl group, etc., or a group of the formula: (a) wherein R11 and R12 are the same or different, and each represents hydrogen atom, a substituted carbonyl group, a substituted sulfonyl group, an optionally substituted alkyl group, etc., R2 represents hydrogen atom, etc., Z represents oxygen atom or a group represented by -N(R 3)- , R3 represents hydrogen atom or an alkyl group, etc., R4 represents hydroge n atom or an alkyl group, etc.,or a pharmaceutically acceptable salt thereof.< /SDOAB> |