1-(2-羟基乙氧基)甲基-5-甲基尿嘧啶

1-[(2R,3S,4S,5S)-4-azido-3-hydroxy-5-(trityloxymethyl)oxolan-2-yl]-5-methylpyrimidine-2,4-dione

1-[(2R,6S)-6-(hydroxymethyl)-3,6-dihydro-2H-pyran-2-yl]-5-methylpyrimidine-2,4-dione

1-[(2R,3S,4S,5S)-3-hydroxy-4,5-bis(hydroxymethyl)oxolan-2-yl]-5-methylpyrimidine-2,4-dione

1-acetyl-5-methylpyrimidine-2,4-dione