Patent ID: 7122189

Claim:
A compound comprising the Formula (I): wherein: R 1 and R 2 are independently selected from the group consisting of substantially non-antigenic polymer residues, C 1-6 alkyls, aralkyls, and terminal branching groups; Y 1-3 are independently O, S or NR 11 ; L 1 and L 2 are independently selected bifunctional linkers; Z is selected from the group consisting of wherein L 3 is a bifunctional linker and Y 4 is O, S or NR 11 , hydrophobic moieties, bifunctional linking moieties and combinations thereof; R 3 –R 11 , R 24 and R 25 are independently selected from the group consisting of hydrogen, C 1-6 alkyls, C 3-19 branched alkyls, C 3-8 cycloalkyls, C 1-6 substituted alkyls, C 3-8 substituted cycloalkyls, aryls, substituted aryls, aralkyls, C 1-6 heteroalkyls, substituted C 1-6 heteroalkyls, C 1-6 alkoxy, phenoxy and C 1-6 heteroalkoxy; A is selected from the group consisting of leaving groups, functional groups, and OH; a and c are each independently 0 or a positive integer: b, d and e are independently 0 or 1; and m, n, o, and p are independently selected positive integers, provided that a and b are both not 0 when c and d are both 0.