1,3-Di(2,4,6-trioxohexahydro-5-pyrimidinylidene)isoindole 2,4,6(1H,3H,5H)-Pyrimidinetrione, 5,5'-(1H-isoindole-1,3(2H)-diylidene)bis- 36888-99-0 5,5'-(1H-Isoindole-1,3(2H)-diylidene)dibarbituric acid 68859-68-7 72779-83-0 EINECS 253-256-2