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2-Naphthalenecarboxylic acid, 3-hydroxy-, reaction products with 4-[(4-aminophenyl)azo]-1-naphthalenamine, sodium sulfide (Na2(Sx)) and sulfur Structure

2-Naphthalenecarboxylic acid, 3-hydroxy-, reaction products with 4-[(4-aminophenyl)azo]-1-naphthalenamine, sodium sulfide (Na2(Sx)) and sulfur