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

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