1 MMZ 1-methyl-1,3-dihydro-2h-imidazole-2-thione 1.000 2 1MZ 1-methylimidazole 0.857 3 MZY 1,3-dihydroimidazole-2-thione 0.857 4 9UW 2-sulfanylideneimidazol-4-one 0.750 5 DMI 2,3-dimethylimidazolium ion 0.750 6 NVI 1-vinylimidazole 0.750 7 XGY (4s)-1-methylimidazolidin-4-amine 0.750 8 ZDL 1,3-dimethylimidazolidine 0.750 9 IMD Imidazole 0.714