Using CC(C)(C)OC(=O)N[C@@H](CC(=O)O)Cc1ccc(Br)cc1, CCI to produce CCOC(=O)C[C@@H](Cc1ccc(Br)cc1)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.