3-[[4-[(4-Amino-3-sodiosulfophenyl)azo]-2-ethoxy-1-naphthalenyl]azo]-4-hydroxy-7-[[3-[(2,4-dihydroxyphenyl)azo]benzoyl]amino]naphthalene-2-sulfonic acid sodium salt
3-[[4-[(4-Amino-3-sodiosulfophenyl)azo]-2-ethoxy-1-naphthalenyl]azo]-4-hydroxy-7-[[3-[(2,4-dihydroxyphenyl)azo]benzoyl]amino]naphthalene-2-sulfonic acid sodium salt