Patent ID: 7157561

Claim:
A compound having the structure wherein Y is O, S, or NH, m is 0 or 1, L is a linker comprising from 0 to 40 carbon atoms arranged in a straight chain or a branched chain, saturated or unsaturated, and further comprising up to two ring structures and 0–20 heteroatoms, with the proviso that not more than two heteroatoms are linked in sequence, Z is a moiety selected from the group consisting of —CONH—, —NHCO—, —NHCONH—, —NHCSNH—, —OCONH—, —NHOCO—, —S—, —NH(C═NH)—, —N═N—, —NH—, and P is selected, from the group consisting of polypeptides, polysaccharides and synthetic polymers, and n is a number from 1 to 50 per 50 kilodaltons molecular weight of P.