4-Amino-2-sulfodiphenylamine 4-Aminodiphenylamine-2-sulfonic acid 5-Amino-2-anilinobenzenesulfonic acid 6-Anilinometanilic acid 91-30-5 Benzenesulfonic acid, 5-amino-2-(phenylamino)- Benzenesulfonic acid, 5-amino-2-anilino- Metanilic acid, 6-anilino- N-Phenyl-p-phenylenediaminesulfonic acid NSC15359