[{"from": "human", "value": "Please give me some details about this molecule. [C][=C][C][=Branch1][#C][=C][Branch1][O][C][=C][Ring1][=Branch1][C@H1][Branch1][Ring1][C][N][O][O][O]"}, {"from": "gpt", "value": "The molecule is secreted by the adrenal medulla and is a widespread central and autonomic neurotransmitter. Norepinephrine is the principal transmitter of most postganglionic sympathetic fibers and of the diffuse projection system in the brain arising from the locus ceruleus. It is also found in plants and is used pharmacologically as a sympathomimetic."}]