Synonyms: 2,4,6(1H,3H,5H)-Pyrimidinetrione, 5,5'-(2-pentene-1,5-diylidene)bis(1,3-dimethyl-;2,4,6-(1H,3H,5H)-Pyrimidinetrione, 1,3-dimethyl-5,5'-(2-pentene-1,5-diylidene)bis-;5,5'-(Pent-2-ene-1,5-diylidene)bis(1,3-dimethylbarbituric) acid;5,5'-(2E)-pent-2-ene-1,5-diylidenebis(1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione)