5'-O-(4,4'-dimethoxytrityl)-3'-deoxythymidin-3'-ylsulfamoyl-[3'(N)->5'(O)]-thymidine

benzyl ((R)-6-(((2S,3S,5R)-2-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)-5-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)tetrahydrofuran-3-yl)amino)-6-oxo-5-(2,2,2-trifluoroacetamido)hexyl)carbamate

5'-O-(4,4'-dimethoxytrityl)-3'-deoxythymidinylsulfamido-(3'(N)->5'(N))-N6-benzoyl-5',2'-dideoxyadenosine

3'-amino-3'-N-(2-methoxy-3,4-dioxocyclobuten-1-yl)-3'-deoxythymidine