Using CON(C)C(=O)C(C)C, Cc1cc(Cl)ccc1NC(=O)OC(C)(C)C to produce CC(C)C(=O)Cc1cc(Cl)ccc1NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.