Cystein-hydantoin 、
propan-2-yl (2S)-2-[[chloro-[[(2R,3R,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]methoxy]phosphoryl]amino]propanoate 在
4-二甲氨基吡啶 作用下,
生成 propan-2-yl (2S)-2-[[(2,5-dioxoimidazolidin-4-yl)methylsulfanyl-[[(2R,3R,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-3,4-dihydroxy-4-methyloxolan-2-yl]methoxy]phosphoryl]amino]propanoate