4-benzoyl-2-hydroxy-1,3-phenylene bis(6-diazo-5,6-dihydro-5-oxonaphthalene-1-sulphonate)

Bis(5,6-dihydro-6-diazo-5-oxonaphthalene-1-sulfonic acid)4-benzoyl-2-hydroxy-1,3-phenylene ester