Patent ID: 7109342

Claim:
A piperidine derivative compound represented by formula (I): (wherein R 1 represents 1) a hydrogen atom or 2) a cyano group; R 2 and R 3 each independently represents 1) a C1–8 alkyl group, 2) a C3–7 cycloalkyl group, 3) a C1–8 alkyl group substituted with a C3–7 cycloalkyl group, 4) a C1–8 alkyl group substituted with 1 to 3 halogen atom(s), 5) a hydrogen atom, 6) a C1–8 alkyl group substituted with a phenyl group, 7) a C1–8 alkyl group substituted with a C1–8 alkoxy group, or (in which n represents 1 to 5); R 4 and R 5 each independently represents 1) a hydrogen atom or 2) a C1–8 alkyl group, or R 4 and R 5 are taken together with the binding carbon atom to represent a C3–7 saturated carbocyclic ring; R 6 represents 1) a hydroxyl group, 2) a C1–8 alkoxy group, 3) —NHOH, or 4) a C1–8 alkoxy group substituted with a phenyl group; and m is 0 or an integer of 1 to 4) or a nontoxic salt thereof.