7-(2-cyanoethoxy(diisopropylamino)phosphinoxy)-1-(4,4'-dimethoxytrityloxymethyl)-5-(9'-fluorenylmethoxycarbonyl)-3-(thymin-1-yl)-2-oxa-5-azabicyclo(2.2.1)heptane
7-(2-cyanoethoxy(diisopropylamino)phosphinoxy)-1-(4,4'-dimethoxytrityloxymethyl)-5-(9'-fluorenylmethoxycarbonyl)-3-(thymin-1-yl)-2-oxa-5-azabicyclo(2.2.1)heptane