3-O-Methyldopa-d3 (3-Methoxy-L-tyrosine-d3) 是 3-O-Methyldopa 的氘代物。3-O-Methyldopa 是一种由邻苯二酚-O-甲基转移酶 (COMT) 形成的 L-DOPA 代谢物。3-O-Methyldopa 竞争性抑制 L-DOPA 和多巴胺 (dopamine) 的药效学。 3-O-Methyldopa-d3 (3-Methoxy-L-tyrosine-d3) is deuterium labeled 3-O-Methyldopa . 3-O-Methyldopa is a metabolite of L-DOPA which is formed by catechol-O-methyltransferase (COMT). 3-O-Methyldopa competitively inhibits the pharmacodynamics of l-DOPA and dopamine.