purpuric acid

5-[(Hexahydro-2,4,6-trioxopyrimidin-5-yl)imino]-2,4,6(1H,3H,5H)-pyrimidinetrione

5-[(Hexahydro-2,4,6-trioxopyrimidine-5-yl)imino]pyrimidine-2,4,6(1H,3H,5H)-trione