7-[[2-[(aminocarbonyl)amino]-4-[(2-bromo-1-oxoallyl)amino]phenyl]azo]naphthalene-1,3-disulphonic acid

7-[[2-[(Aminocarbonyl)amino]-4-[(2-bromo-1-oxo-2-propenyl)amino]phenyl]azo]-1,3-naphthalenedisulfonic acid