1929-19-7 2-Nitrobenzaldehyde ((2-nitrophenyl)methylene)hydrazone AI3-61276 Benzaldehyde, 2-nitro-, ((2-nitrophenyl)methylene)hydrazone Dinitro-2,2' bis-benzylidene hydrazine [French] Hydrazine, 1,2-bis(o-nitrobenzylidene)-