[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][Branch1][O][C][O][C][=C][C][=C][C][=C][Ring1][=Branch1][N][Branch1][Ring2][C][C][Cl][C][C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is a synthetic, dibenzamine alpha adrenergic antagonist with antihypertensive and vasodilatory properties. Phenoxybenzamine non-selectively and irreversibly blocks the postsynaptic alpha-adrenergic receptor in smooth muscle, thereby preventing vasoconstriction, relieving vasospasms, and decreasing peripheral resistance. Reflex tachycardia may occur and may be enhanced by blockade of alpha-2 receptors which enhances norepinephrine release. Phenoxybenzamine is reasonably anticipated to be a human carcinogen."}]