1-[(2R,4R,5S)-5-(tert-Butyl-dimethyl-silanyloxymethyl)-4-(2-imidazol-1-yl-2-oxo-ethyl)-tetrahydro-furan-2-yl]-5-methyl-3-(2-trimethylsilanyl-ethoxymethyl)-1H-pyrimidine-2,4-dione

Acetic acid (2R,3S,5R)-2-{(2-cyano-ethoxy)-[(2S,3S,5R)-2-formyl-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-3-yloxy]-phosphoryloxymethyl}-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-3-yl ester

(E)-3'-O-Acetyl-5'-(3-{(3'R)-5'-O-(tert-butyldimethylsilyl)-3-[(2-trimethylsilylethoxy)methyl]-3'-deoxythymidin-3'-yl}-2-oxopropylidene)-5'-deoxythymidine

(3'-O-Acetylthymidin-5'-O-yl)(2-cyanoethoxy)[5'-O-(4,4'-dimethoxytrityl)thymidin-3'-O-yl]phosphane

2-Cyanoethyl (3'-O-acetylthymidin-5'-O-yl)[5'-O-(4,4'-dimethoxytrityl)thymidin-3'-O-yl]phosphinate