[2-[二(氮丙啶-1-基)磷酰基氧基甲基]-5-(5-甲基-2,4-二氧代嘧啶-1-基)四氢呋喃-3-基]乙酸酯

1-[5-[二(氮丙啶-1-基)磷酰基氧基甲基]-4-羟基四氢呋喃-2-基]-5-甲基嘧啶-2,4-二酮

1-[5-[二(2,2-二甲基氮丙啶-1-基)磷酰基氧基甲基]-4-羟基四氢呋喃-2-基]-5-甲基嘧啶-2,4-二酮

[5-(5-methyl-2,4-dioxopyrimidin-1-yl)-2-(methylsulfonyloxymethyl)oxolan-3-yl] acetate