Cleve's acid, Naphthylamin-(1)-sulfonsaeure-(3), 2-Naphthalenesulfonic acid, 4-amino-, 4-Amino-naphthalin-2-sulfonsaeure, 1-Amino-naphthalin-sulfonsaeure-(3), 4-amino-naphthalene-2-sulfonic acid, 1-Naphthylamine,3-sulfo, 1-aminonaphthalene-3-sulfonic acid, 4-Amino-2-naphthalenesulfonic acid