| abstract |
The disclosure provides a multi-arm multi-claw polyethylene glycol derivative suitable for click chemistry reactions of general formula I, wherein R is a polyethylene glycol residue having a linear-chain structure, a Y-type structure or a multi-branched structure, R 1 , R 2 and R 3 are linking groups, P is an terminal group of non-azido non-alkynyl group, D is —N 3 or —C≡CH, l is selected from an integer of 1 to 20, and m is selected from an integer of 0 to 19. |