CARBOXYMETHYL PIPERIDINE DERIVATIVE

摘要

The present invention provides a new compound which has NK 1 receptor antagonist activity ,whose CYP3A4 inhibitory activity is reduced compared to aprepitant, and which are useful for the prevention or treatment of cancer-chemotherapy-induced nausea and vomiting. That is, the present invention relates to carboxymethyl piperidine derivatives represented by the following formula (I) or a pharmaceutically acceptable salt thereof. Wherein, ring A is a benzene ring or the like; ring B is a pyridine ring or the like; R 1 is C 1-6 alkyl or C 1-6 alkoxy; R 2 and R 3 are a hydrogen atom or methyl; and n is an integral number from 0 to 5.
Formula (I):