[{"from": "human", "value": "Describe this molecule. [C][C@H1][C][N][Branch2][Ring1][Ring2][C][C][C@@][Ring1][=Branch1][Branch1][C][C][C][=C][C][=Branch1][=Branch1][=C][C][=C][Ring1][=Branch1][O][C][C@H1][Branch1][#Branch2][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][N][C][C][=Branch1][C][=O][O].[O].[O]"}, {"from": "gpt", "value": "The molecule is a synthetic trans-3,4-dimethyl-4-(3-hydroxyphenyl) piperidine with peripherally selective opioid mu receptor antagonist activity. Alvimopan is a selective and competitive antagonist at mu-opioid receptors, found in myenteric and submucosal neurons and the immune cells of the lamina propria in the human gut. Upon administration, this agent binds to mu-opioid receptors in the gut, thereby reversing opioid-related disturbances in gut motility. Alvimopan is approximately three to nine times more potent than naloxone."}]