Aminonaphthols and other aminophenols, other than those containing more than one kind of oxygen function, their ethers and esters; salts thereof
Aminohydroxynaphthalenesulphonic acids and their salts
Aminonaphthols and other aminophenols, their ethers and esters; salts thereof (excl. those containing > one kind of oxygen function; aminohydroxynaphthalenesulphonic acids and their salts)