C([O:5][C:6]([NH:8][NH:9][C:10](=[NH:20])[C:11]1[CH:16]=[CH:15][C:14]([N+:17]([O-:19])=[O:18])=[CH:13][CH:12]=1)=O)(C)(C)C>C(#N)C>[N+:17]([C:14]1[CH:15]=[CH:16][C:11]([C:10]2[NH:9][NH:8][C:6](=[O:5])[N:20]=2)=[CH:12][CH:13]=1)([O-:19])=[O:18]N′-[Imino-(4-nitro-phenyl)-methyl]-hydrazinecarboxylic acid tert-butyl ester (made above, 410 mg) was suspended in 3 mL of acetonitrile and the mixture was heated at 200° C. for 5 min. The mixture was cooled and the solid was filtered and dried. 341 mg.
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