Using BrCc1ccccc1, CC(C)(C)OC(=O)N1C(=O)CC[C@H]1C(=O)O to produce O=C(OCc1ccccc1)C1CCC(=O)N1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.