SEARCH Articles Figures Tables 1 -Methyl-3-nitro-1 -nitrosoguanidine 1 -Methyl-3-nitro-1 -nitrosoguanidine MNNG) Methyl-3-nitro-l-nitrosoguanidine Nitrosoguanidine preparation Nitrosoguanidines Nitrosoguanidines Nitrosoguanidines structure