83221-63-0 4-amino-3-[[4-[(2,4-diaminophenyl)azo]-2,2-disulpho[1,1-biphenyl]-4-yl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonic acid, sodium salt
83221-66-3 4-amino-5-hydroxy-3-[[4-[[[4-[(4-hydroxyphenyl)azo]phenyl]amino]carbonyl]phenyl]azo]-6-(phenylazo)naphthalene-2,7-disulphonic acid, sodium salt