Using COS(=O)(=O)OC, CC(C)(C)OC(=O)N1CCc2cc(O)ccc2C1C(=O)O to produce COC(=O)C1c2ccc(O)cc2CCN1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.