... From the organic layer 0.5 g (90%) of hydroquinone was obtained, and 2.3 g (90%) of BNA'C1- and 1.1 g (70%) of A were isolated from the aqueous solution. Reduction of Benzyl Viologen by A-aPy'. ... 4-Nitrobenzofurazan and 4-Nitrobenzofuroxan J. Org. Chem., Vol. 45, No. ...