阿糖尿苷

5',3'-O-(tetraisopropyldisiloxane-1,3-di-yl)-1-β-D-arabinofuranosyl-uracil

2-[(2R,3R,3aS,9aR)-2-(2,4-Dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-5,5,7,7-tetraisopropyl-tetrahydro-1,4,6,8-tetraoxa-5,7-disila-cyclopentacycloocten-3-yl]-isoindole-1,3-dione

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