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1-ACETYLAMINO-7-NAPHTHOL|1-AMINO-5-NAPHTHOL|1-amino-7-naphthol|1-naphthol-5-sulfonic acid ( L acid )|1,5-naphthalene disulfonic acid disodium salt|1,6-naphthalene disulfonic acid disodium salt|2,6-naphthalene disulfonic acid disodium salt|2,7-naphthalene disulfonic acid disodium salt|1,5-dihydroxy naphthalene|1,6-dihydroxy naphthalene