Using CC(=O)OC(C)(C)C, CCOC(=O)c1cc2cc(Cl)ccc2n1C to produce Cn1c(C(=O)CC(=O)OC(C)(C)C)cc2cc(Cl)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.