O-(2-(BOC-AMINO)-ETHYL)-O-(2-(DIGLYCOLYL-AMINO)ETHYL)EG6;Boc-amino PEG6 diglycolic acid, O-[2-(Boc-amino)-ethyl]-O′-[2-(diglycolyl-amino)ethyl]hexaethylene glycol;boc-peg-acid (n=7);Boc-NH-PEG(12)-COOH;Boc-NH-PEG(8)-COOH
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