Using COc1ccc(-c2ccc3cnc(Nc4cccc(N)c4)nn23)cn1, CO[C@H](C)C(=O)O to produce COc1ccc(-c2ccc3cnc(Nc4cccc(NC(=O)[C@@H](C)OC)c4)nn23)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.