1-Nitroso-5,6-dihydrothymine 2,4(1H,3H)-Pyrimidinedione, dihydro-5-methyl-1-nitroso- (9CI) 62641-67-2 CCRIS 1957 Dihydro-5-methyl-1-nitroso-2,4(1H,3H)-pyrimidinedione Thymine, 5,6-dihydro-1-nitroso-