(4-ethoxy-6-imino-5-((4-(4-methyl-6-oxo-1,4,5,6-tetrahydropyridazin-3-yl)phenyl)hydrazono)-5,6-dihydro-1H-pyrimidin-2-ylidene)-(4-(4-methyl-6-oxo-1,4,5,6-tetrahydropyridazin-3-yl)phenylazo)acetonitrile