5461-85-8 Guanidine, 1-isobutyl-3-nitro-1-nitroso- Guanidine, N-(2-methylpropyl)-N''-nitro-N-nitroso- Guanidine, N-(2-methylpropyl)-N'-nitro-N-nitroso- Isobutylnitrosonitroguanidine N-Isobutyl-N'-nitro-N-nitrosoguanidine NSC25073