4-hydroxy-7-acetylaminonaphthalene-2-sulphonic acid, 2-acetylamino-5-hydroxy-naphthalene-7-sulfonic acid, 2-Acetamido-5-hydroxy-7-naphthalenesulfonic acid, 6-acetylamino-1-hydroxynaphthalene-3-sulfonic acid, 6-acetylamino-1-naphthol-3-sulphonic acid, 7-acetylamino-4-hydroxy-naphthalene-2-sulfonic acid, 2-Acetylamino-5-hydroxy-7-naphthalenesulfonic acid, 7-Acetylamino-4-hydroxy-naphthalin-2-sulfonsaeure