Patent ID: 8450481

Claim:
A compound comprising (1) (a) formula (II) wherein each L 2 is independently selected from a group consisting of a bond, SO 2 , SO 2 NH, CO 2 NH, (C═O)NH, (C═O)NHNH(C═O), C═O, O(C═O), (C═O)O and C1-C22 alkylene, each R 4 is independently selected from a group consisting of H, C1-C6 aminoalkyl, C2-C6 aminoalkenyl, C2-C6 aminoalkynyl, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl and 5-6 membered aromatic ring; and wherein at least one R 4 is a C1-C6 aminoalkyl.