Using CCOC(=O)C1=C(O)c2ccc(Br)cc2C(C)(C)C1=O, C[C@H](N)C(=O)OC(C)(C)C to produce C[C@H](NC(=O)C1=C(O)c2ccc(Br)cc2C(C)(C)C1=O)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.