2-(1,1-二甲基乙基)-4,5-二氢-4,4,5,5-四甲基-1H-咪唑-1-基氧基

3-methyl-3-methylsulfanyl-1H-indol-2-one

4,4,5,5-tetramethylimidazolidin-2-one

3-(1-hydroxy-4,4,5,5-tetramethyl-3-oxidoimidazol-3-ium-2-yl)pyridine