[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][O][C][=Branch1][C][=O][C][Branch1][O][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is a piperidinecarboxylate ester that is piperidine which is substituted by a methyl group at position 1 and by phenyl and ethoxycarbonyl groups at position 4. It is an analgesic which is used for the treatment of moderate to severe pain, including postoperative pain and labour pain. It has a role as an opioid analgesic, a kappa-opioid receptor agonist, a mu-opioid receptor agonist and an antispasmodic drug. It is an ethyl ester, a piperidinecarboxylate ester and a tertiary amino compound. It is a conjugate base of a pethidine(1+)."}]