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Reaction schemes for the cationic ring opening polymerization of 2-methyl-2-oxazoline initiated by N-[2-(p-toluenesulfonyloxy)-ethyl]-phthalimide (NH2-PMOx-OH) and the preparation of block copolymers of PMOx (or PEG) and protected poly(amino acids) (OH-PMOxn-b-P(BAA)m, and CM-PEGn-b-P(BAA)m)
