Phosphonic acid [5'-O-(4,4'-dimethoxytrityl)-N-benzoyl-2'-deoxy-3'-adenosyl][3'-O-(tert-butyldimethylsilyl)-5'-thymidyl] ester | Phosphonic acid [5'-O-(4,4'-dimethoxytrityl)-N-benzoyl-2'-deoxy-3'-adenosyl][3'-O-(tert-butyldimethylsilyl)-5'-thymidyl] ester | |