2'-Deoxy-5'-O-p-toluenesulfonyluridine

2'-Deoxy-5'-O-DMT-5-propargyloxyuridine

5'-O-(P-TOLUENESULFONYL)-2'-DEOXYURIDINE

2'-Deoxy-5'-O-p-toluenesulfonyl-D-uridine

5'-O-(DIMETHOXYTRITYL)-5-(PROPARGYLOXY)-2'-DEOXYURIDINE