Patent ID: 8106022

Claim:
An iRNA agent comprising a compound having the structure shown in formula (I) wherein: A and B are each independently for each occurrence O, N(R N ) or S; R N is independently for each occurrence H or C 1 -C 6 alkyl; X and Y are each independently for each occurrence H, a protecting group, a phosphate group, a phosphodiester group, an activated phosphate group, an activated phosphite group, a phosphoramidite, a solid support, —P(Z′)(Z″)O-nucleoside, —P(Z′)(Z″)O-oligonucleotide, a lipid, a PEG, a steroid, a polymer, a nucleotide, a nucleoside, —P(Z′)(Z″)O-Linker-OP(Z″′)(Z″″)O-oligonucleotide, an oligonucleotide, —P(Z′)(Z″)-formula (I), —P(Z′)(Z″)- or -Linker-R; R is L G or has the structure shown below: L G is independently for each occurrence a ligand; and Z′, Z″, Z″′ and Z″″ are each independently for each occurrence O or S.