5'-O-[3-methoxy-9-phenylthioxanthyl]thymidine

O4-(4-nitrophenylsulfonylethyl)thymidine

1-[(2R,4S,5R)-5-(hydroxymethyl)-4-[(4-methoxyphenyl)-diphenylmethoxy]oxolan-2-yl]-5-methylpyrimidine-2,4-dione

1-[3,5-O-(di-tert-butylsilylene)-2-deoxy-β-D-ribofuranosyl]thymine

4-O-phenylthymidine