sodium 2-[[5-carbamoyl-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridyl]azo]-4-[(2,3-dibromo-1-oxopropyl)amino]benzenesulphonate

2-[[[5-(Aminocarbonyl)-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxopyridin]-3-yl]azo]-4-[(2,3-dibromo-1-oxopropyl)amino]benzenesulfonic acid sodium salt