Methylthiouracil CAS 56-04-2, Suav alias ntawm 6-methyl-2-thiouracil (6-methyl-2-thiouracil), yog ib qho tseem ceeb kws tshuaj intermediate; nws tsis tsuas yog muaj tshuaj tua kab mob ua haujlwm, tab sis kuj tuaj yeem siv los kho hyperthyroidism. Nws inhibits zus tau tej cov thyroxine los ntawm inhibiting lub peroxidase system nyob rau hauv lub thyroid, yog li ua tiav cov nyhuv ntawm kev kho mob hyperthyroidism.