CARBOXYMETHYL PIPERIDINE DERIVATIVE

摘要

The present invention provides a novel compound useful in the prevention or treatment of nausea and vomiting associated with the administration of antineoplastics, the compound having an NK1 receptor-antagonizing effect, and an inhibitory effect on CYP3A4 that is attenuated to a greater extent than in aprepitant. Specifically, the present invention relates to a carboxymethyl piperidine derivative represented by formula (I) or a pharmacologically acceptable salt thereof. In the formula, ring A is a benzene ring or the like, ring B is a pyridine ring or the like, R1 is a C1-6 alkyl or C1-6 alkoxy, R2 and R3 are hydrogen atoms or methyl, and n represents an integer of from 0 to 5.