Synonyms: 4,6(1H,5H)-Pyrimidinedione, 5-(5-(1,3-diethylhexahydro-4,6-dioxo-2-thioxo-5-pyrimidinyl)-2,4-pentadien-1-ylidene)-1,3-diethyldihydro-2-thioxo-;4,6(1H,5H)-Pyrimidinedione, 5-(5-(1,3-diethylhexahydro-4,6-dioxo-2-thioxo-5-pyrimidinyl)-2,4-pentadienylidene)-1,3-diethyldihydro-2-thioxo-;5,5'-(Penta-1,3-dien-1-yl-5-ylidene)bis(1,3-diethyl-2-thiobarbituric) acid;5,5'-penta-1,3-dien-1-yl-5-ylidenebis(1,3-diethyl-2-thioxodihydropyrimidine-4,6(1H,5H)-dione)