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tetrasodium (3Z)-3-{2-[4-{(2E)-2-[6-{[4-(benzoylamino)phenyl]amino}-1-oxo-3-sulfonatonaphthalen-2(1H)-ylidene]hydrazinyl}-3-(carboxylatomethoxy)-7-sulfonatonaphthalen-1-yl]hydrazinylidene}-6-oxocycloh related products: