Using CSCC[C@H](NC(=O)OCC1c2ccccc2-c2ccccc21)C(=O)N[C@@H](C)C(=O)N[C@@H](CC(C)C)C(=O)O, BrCc1ccccc1 to produce CSCC[C@H](NC(=O)OCC1c2ccccc2-c2ccccc21)C(=O)N[C@@H](C)C(=O)N[C@@H](CC(C)C)C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.