5′-O-DMTr-2′-O-TMBTM-C(Bz)-3′-O-succinate, TEA salt

N4-benzoyl-5'-O-(4, 4'-dimethoxytrityl)-2'-O-(2, 4, 6-trimethoxybenzylthiomethyl)-cytidine -3'-O-succinate, triethylamine salt