[{"from": "human", "value": "Provide a brief overview of this molecule. [C][O][C][C][O][C][C][O][C][C][O][C][C][O][C][C][O][C][C][O][C][C][O][C@H1][C][C][C@][Branch2][Ring1][P][C@H1][C][C][=C][C@][Ring1][=Branch1][Branch1][S][C@H1][Ring1][#Branch2][O][C][Ring1][Branch1][=C][Branch1][Branch1][C][=C][Ring1][=Branch2][O][C][C][N][Ring1][#C][C][C][=C][O]"}, {"from": "gpt", "value": "The molecule is a peripherally acting opioid antagonist which is used to treat constipation caused by chronic opioid use for noncancer pain. Naloxegol has not been linked to serum enzyme elevations during therapy or to clinically apparent liver injury."}]