[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a monocarboxylic acid amide resulting from the formal condensation of the aryl amino group of methyl 4-anilino-1-(2-phenylethyl)piperidine-4-carboxylate with propanoic acid. It has a role as a mu-opioid receptor agonist, an opioid analgesic and a tranquilizing drug. It is a member of piperidines, a methyl ester, a tertiary amino compound and a tertiary carboxamide."}, {"from": "gpt", "value": "[C][C][C][=Branch1][C][=O][N][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C][Branch2][Ring1][Ring2][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O][C]"}]