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sodium (3Z)-5-amino-3-(2-{4-[(E)-2-{4-[(2E)-2-(7-amino-1-oxo-3-sulfonaphthalen-2(1H)-ylidene)hydrazinyl]-2-sulfophenyl}ethenyl]-3-sulfophenyl}hydrazinylidene)-4-oxo-7-sulfo-3,4-dihydronaphthalene-2-su related products: