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Benzoxazolium,6-[[3-[[(4-chlorophenyl)amino]carbonyl]-2-hydroxy-1-naphthalenyl]azo]-2-[4-[[3-[[(4-chlorophenyl)amino]carbonyl]-2-hydroxy-1-naphthalenyl]azo]-3-methylphenyl]-3-ethyl-, iodide related products: