7-(2',3',5'-tri-O-acetyl-β-D-ribofuranosyl)-N2-acetylguanine

2-[(2,4,6-trioxo-1,3-diazinan-1-yl)methoxy]ethyl acetate

2-[(2-amino-6-oxo-3H-purin-7-yl)methoxy]ethyl acetate

9-(2-乙酰氧基乙氧基甲基)鸟嘌呤

2-[(5-氟-2,4-二氧代-3,4-二氢-1(2H)-嘧啶基)甲氧基]乙基乙酸酯