2,4(1H,3H)-Pyrimidinedione, 5,6-dimethyl- (9CI) 26305-13-5 5,6-Dimethyl-2,4(1H,3H)-pyrimidinedione 5,6-Dimethyluracil 6-Methylthymine EINECS 247-601-6 NSC 163903 Uracil, 5,6-dimethyl-