Using CC(C)(C)OC(=O)Nc1ccc(O)c(C(=O)O)c1, CC(=O)Cl to produce CC(=O)Oc1ccc(NC(=O)OC(C)(C)C)cc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.