1-Nitroso-2-nitroamino-2-imidazoline 1H-Imidazol-2-amine, 4,5-dihydro-N-nitro-1-nitroso- 35878-49-0 4,5-Dihydro-N-nitro-1-nitroso-1H-imidazol-2-amine 4-25-00-04687 (Beilstein Handbook Reference) BRN 0180830 NSC 25958