7-[(4-Aminobenzoyl)amino]-4-hydroxy-3-[[4-[(5-hydroxy-6-phenylazo-7-sodiosulfo-2-naphthalenyl)aminocarbonyl]phenyl]azo]naphthalene-2-sulfonic acid sodium salt
7-[(4-Aminobenzoyl)amino]-4-hydroxy-3-[[4-[(5-hydroxy-6-phenylazo-7-sodiosulfo-2-naphthalenyl)aminocarbonyl]phenyl]azo]naphthalene-2-sulfonic acid sodium salt