2-氨基-1-甲基-6-苯基咪唑[4,5-b]吡啶

2-[methyl-(N'-methylcarbamimidoyl)amino]acetic acid

2-imino-1,3-dimethylimidazolidin-4-one

(氨基羰基)(甲基)氨基]乙酸

(5E)-2-氨基-5-羟基亚胺-1-甲基咪唑-4-酮