Patent ID: 6899867
Filing Date: 2005-05-31
Classification: A61K,A61P,C08G,Y10S

Abstract:
1. A reactive polymer having the formula: wherein: PEG is linear or branched poly(ethylene glycol); L is selected from the group consisting of —O—, —S—, —NR— where R is H, C1-C6 alkyl or substituted C1-C6 alkyl, —C(O)—O—, —O—C(O)—, —O—C(O)—O—, —C(O)—NH—, —NH—C(O)—, —SO—, and —SO Ar is ortho-, meta-, or para-substituted phenylene; and X is an activating group capable of reacting with a biologically active agent to form a carbamate linkage.