[{"from": "human", "value": "Could you provide a description of this molecule? [C][=C][C][=Branch1][N][=C][Branch1][Branch2][C][=C][Ring1][=Branch1][C][C][N][O][O]"}, {"from": "gpt", "value": "The molecule is derived from tyrosine and is the precursor to norepinephrine and epinephrine. Dopamine is a major transmitter in the extrapyramidal system of the brain, and important in regulating movement. A family of receptors (receptors, dopamine) mediate its action. "}]