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