Synonyms: 1-Naphthalenesulfonicacid, 6-diazo-5,6-dihydro-5-oxo-, 4-ester with 2,3,4-trihydroxybenzophenone(7CI,8CI); Benzophenone, 2,3,4-trihydroxy-,4-(6-diazo-5,6-dihydro-5-oxo-1-naphthalenesulfonate) (8CI); Benzophenone,2,3,4-trihydroxy-, 4-ester with 6-diazo-5,6-dihydro-5-oxo-1-naphthalenesulfonicacid (8CI); 2,3-Dihydroxy-4-benzoylphenyl1,2-naphthoquinone-2-diazide-5-sulfonate; 4-Benzoyl-2,3-dihydroxyphenyl2-diazo-1,2-dihydro-1-oxo-5-naphthalenesulfonate;4-[Naphthoquinone-(1,2)-diazide-(2)-sulfonyloxy-(5)]-2,3-dihydroxybenzophenone