... NAPHTHALENE DISULFONIC ACID 1,5-NAPHTHALENE DISULFONIC ACID SODIUM SALT(1,5-NDS)1,6-CLEVES ACID1,6- ... NAPHTHALENE DISULFONIC ACID SODIUM SALT(1,6-NDS)1,7-CLEVES ACID1,8- ... -NAPHTHYLAMINE2,3- ACID2,6-NAPHTHALENE DISULFONIC ACID SODIUM SALT(2,6-NDS)2,7-DIHYDROXY NAPHTHALENE2,7-NAPHTHALENE ... DISULFONIC ACID SODIUM SALT(2,7-NDS)2-NAPHTHOL4-CHLORO-1,8- ...