5'-O-benzyl-6-N-(tert-butyloxycarbonyl)-4'α-carboxyl-2'-deoxyadenosine

2-(2-bromophenyl)-2-methylpropanol

5'-O-benzyl-6-N-benzoyl-3'-O-(tert-butyldimethylsilyl)-2'-deoxy-4'α-methoxycarbonyl-D-adenosine

5'-O-benzyl-4'α-[(2-(2-bromophenyl)-2-methylpropylthio)carbonyl]-6-N-(tert-butyloxycarbonyl)-2'-deoxyadenosine

5'-O-benzyl-4'α-[(2-(2-bromophenyl)-2-methylpropylthio)carbonyl]-6-N-(tert-butyloxycarbonyl)-2'-deoxy-3'-O-diethylphosphoryladenosine