ESTER OF 2-DIAZO-1-NAPHTHOL-4-SULFONE WITH 2,3,4-TRIHYDROXY-BENZOPHENONE;ESTER OF 2-DIAZO-1-NAPHTHOL-5-SULFONE WITH 2,3,4,4'-TETRAHYDROXY-BENZOPHENONE;2-diazo-1-naphthol-5-sulfonic acid, ester with 2,3,4,4'-tetrahydroxy benzophenone;1-Naphthalenesulfonic