has role has functional parent independent continuant uracil antioxidant antimetabolite pyrimidinethione antithyroid drug carcinogenic agent EC 1.14.13.39 (nitric oxide synthase) inhibitor antidote to paracetamol poisoning 6-propyl-2-thiouracil A pyrimidinethione consisting of uracil in which the 2-oxo group is substituted by a thio group and the hydrogen at position 6 is substituted by a propyl group. CHEBI:8502