4,6-Diaminobenzene-1,3-disulfonic acid diazo, and 1-ethyl-6-hydroxy-4-methyl-2-oxo-1,2-dihydropyridine-3-carboxamide?coupling, and 2,4,6-Trichloro-1,3,5-triazine and 5-Amino-2-(4-aminophenylamino)benzenesulfonic acid?condensation, and then into potassium.