1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, 4-benzoyl-1,3-phenylene ester 1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, diester with 2,4-dihydroxybenzophenone 2,4-Dihydroxybenzophenone, 2-diazo-1,2-dihydro-1-oxo-5-naphthalenesulfonate diester 31001-73-7 NSC343232