Patent ID: 8283455

Claim:
The compound of the formula: wherein Cmp is selected from the group consisting of an amino acid, a carbohydrate, a peptide, and an oligosaccharide; A is selected from the group consisting of —(OCH 2 CH 2 )—, —(OCH 2 CH 2 CH 2 )—, and grafted —(OCH 2 CH 2 ) n1 —(OCH 2 CH 2 CH 2 ) n2 —; B is selected from the group consisting of —(OCH 2 CH 2 )—, —(OCH 2 CH 2 CH 2 )—, and grafted —(OCH 2 CH 2 ) m1 —(OCH 2 CH 2 CH 2 ) m2 —; n is 0-50; m is 0-50; z is at least 1; R 2 is selected from the group consisting of H, —CH 3 , alkyl, phenyl, —CH 2 CH 2 CN and CONH 2 and, R 3 is selected from the group consisting of H, —CH 3 , alkyl, phenyl, —CH 2 CH 2 CN and CONH 2 .