Using COS(=O)(=O)OC, CCOC(=O)C1([C@@H]2CN(C(=O)OCc3ccccc3)C[C@H]2O)CC1 to produce CO[C@H]1CN(C(=O)OCc2ccccc2)C[C@@H]1C1(C(=O)O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.