[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an acetate ester and a tertiary amino compound. It has a role as an opioid analgesic and a mu-opioid receptor antagonist."}, {"from": "gpt", "value": "[C][C][C@@H1][Branch2][Ring1][S][C][Branch1][O][C][C@H1][Branch1][C][C][N][Branch1][C][C][C][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1][O][C][=Branch1][C][=O][C]"}]