Synonyms: 2,4,6(1H,3H,5H)-Pyrimidinetrione,1,3-dimethyl-5-[(tetrahydro-1,3-dimethyl-2,4,6-trioxo-5(2H)-pyrimidinylidene)amino]-,ion(1-), ammonium (9CI); Barbituric acid, 5,5'-nitrilobis[1,3-dimethyl-,monoammonium salt (8CI); Ammonium tetramethylmurexide; Murexoin; Tetramethylmurexide