4-hydroxy-7-(4-methoxyanilino)naphthalene-2-sulfonic acid

4-hydroxy-7-(4-methoxyphenylamino)naphthalene-2-sulfonicacid

1-Hydroxy-6-(4-methoxyphenylamino)-3-naphthalenesulfonic acid

4-Hydroxy-7-[(4-methoxyphenyl)amino]-2-naphthalenesulfonic acid

4-hydroxy-7-[(4-methoxyphenyl)amino]naphthalen-2-sulphonic acid