Patent ID: 7413738

Claim:
A compound comprising the Formula (I): wherein: R 1 is selected from the group consisting of substantially non-antigenic polymer residues, C 1-6 alkyls, C 2-6 alkenyls, C 2-6 alkynyls, aralkyls, and terminal branching groups; Z and Z′ are the same or different and are independently selected from the group consisting of hydrophobic moieties, bifunctional linking moieties, wherein L 5 is a bifunctional linker and Y 4 is O, S or NR 11 , and combinations thereof; Y 1-3 may be the same or different and are selected from the group consisting of O, S and NR 11 ; L 1 and L 3 are independently bifunctional linkers; R 3 -R 11 , R 24 and R 25 may be the same or different and are selected from the group consisting of hydrogen, C 1-6 alkyls, C 2-6 alkenyls, C 2-6 alkynyls, C 3-19 branched alkyls, C 3-8 cycloalkyls, C 1-6 substituted alkyls, C 2-6 substituted alkenyls, C 2-6 substituted alkynyls, 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; L 2 is —C(O)(CR 30 R 31 )Y 15 (CR 32 R 33 )C(O)NR 35 — or —C(O)(CR 30 R 31 )(CR 32 R 33 )C(O)NR 35 — wherein: Y 15 is selected from the group consisting of O, S, NR 34 and CH 2 , and R 30-35 may be the same or different and are selected from the group consisting of H, alkyl, alkenyl, alkynyl, heteroalkyl and aryl; A and A′ may be the same or different and are independently selected from the group consisting of alkyl groups, leaving groups, functional groups, proteins, enzymes, and OH; a, g, and e, maybe the same or different and are independently 0 or a positive integer from about 1 to about 5; b, c, d and d′ may be the same or different and are independently 0 or 1, and m, n, o, and p may be the same or different and are independently a positive integer from about 1 to about 6, provided that (a+e) is equal to or greater than 1.