Synonyms: 1-Naphthalenesulfonicacid, 3-diazo-3,4-dihydro-4-oxo-, 4-benzoyl-1,2,3-benzenetriyl ester (9CI);2,3,4-Trihydroxybenzophenone naphthoquinone-(1,2)-diazide(2)-4-sulfonic acidtriester; 2,3,4-Tris(1-oxo-2-diazonaphthoquinone-4-ylsulfonyloxy)benzophenone;2,3,4-Tris[1-oxo-2-diazonaphthoquinone-4-sulfonyloxy]benzophenone; D 4SB; NT(4)300; NT Ester-4-sulfonic acid