Using CC(C)(C)OC(=O)Nc1cc(C(=O)O)cc(C(=O)O)c1 to produce Nc1cc(C(=O)OCc2ccccc2)cc(C(=O)OCc2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.