[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][C][=Branch1][C][=O][N][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C][Branch2][Ring1][#Branch2][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][C][N][C][=Branch1][C][=O][N][Branch1][Branch1][N][=N][Ring1][=Branch1][C][C][C][O][C]"}, {"from": "gpt", "value": "The molecule is a synthetic short-acting opioid with analgesic and local anesthesia enhancing activity. Alfentanil primarily binds to mu-opioid receptor, a G-protein-coupled receptor, thereby mimicking the actions of morphine, the prototypical mu receptor agonist. This agent induces anti-nociception responses mediated through inhibiting the release of various neurotransmitters such as substance P, GABA, dopamine, acetylcholine and noradrenaline; in addition, the release of vasopressin, somatostatin, insulin and glucagon are also inhibited."}]