3'-O-tert-Butyldiphenylsilyl-5'-azido-5'-deoxythymidine

5'-Amino-3'-tert-butyldiphenylsilyl-5'-deoxythymidine

(S)-[(2S,3S,5R)-2-(tert-Butyl-diphenyl-silanyloxymethyl)-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-3-ylmethyl]-(1,1-diethoxy-ethyl)-phosphinic acid ethyl ester