4-羟基嘧啶

2,4-二乙氧基嘧啶

2,2-dimethyl-1,3-dioxin-4-one

tert-butyl (2S,5S)-2-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-3,3-difluoro-5-(hydroxymethyl)pyrrolidine-1-carboxylate

甲亚胺酸