2-Furaldehyde, 5-nitro-, 2-ethylsemicarbazone 5-Nitro-2-furaldehyde 2-ethylsemicarbazone 5579-89-5 Etafurazone Hydrazinecarboxamide, 1-ethyl-2-[(5-nitro-2-furanyl)methylene]- NF-161 NSC186580 Nifursemizone