Using BrCc1ccccc1, CC(C)(C)OC(=O)N1C(=O)CC[C@H]1C(=O)O to produce CC(C)(C)OC(=O)N1C(=O)CCC1C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.