((2R,3R,3aS,9aR)-3-(benzoyloxy)-3a-methyl-6-oxo-2,3,3a,9a-tetrahydro-6H-furo[2',3':4,5]oxazolo[3,2-a]pyrimidin-2-yl)methyl benzoate

4-ethoxy-1-[3,5-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)-β-D-erythro-2-pentulofuranosyl]-2(1H)-pyrimidinone

4-ethoxy-1-(3,5-O-TIPDS-1,3-diyl-β-D-ribofuranosyl)-2(1H)-pyrimidinone

4-chloro-1-(tri-O-acetyl-β-D-ribofuranosyl)-1H-pyrimidin-2-one

尿嘧啶核苷