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The reaction of 2,3-dichloro-1,4-naphthoquinone with p-nitrobenzhydrazide yeilds the disubstituted product bis-(p-nitrobenzhydrazino)-1,4-napthtquinone.
H. M. Ali,; S. N. Abdul Halim,; S. W. Ng. Bis[5-bromo-1H-indole-3-carbaldehyde (2-nitrobenzoyl)hydrazonato-[kappa]2N,O]bis(pyridine-[kappa]N)nickel(II) pyridine disolvate. Acta Cryst. 2005, E61, m1682-m1683.
F. I. Carrolla,; H. Wayne Millera. The Reaction Of 2,3-Dichloro-1,4-Naphthoquinone With P-Nitrobenzhydrazide1 . Organic Preparations and Procedures. 1970, 2 (4), 259-263.