2-NAPHTHALENESULFONIC ACID, 4-HYDROXY-7-((4-(((2-METHOXYETHOXY)CARBONYL)AMINO)PHENYL)AMINO)-, POTASSIUM SALT
2-naphthalenesulfonic acid, 4-hydroxy-7-((4-(((2-methoxyethoxy)carbonyl)amino)phenyl)amino)-, potassium salt