Using COC(=O)C(O)CC(C)C, Cc1onc(NC(=O)OCC(Cl)(Cl)Cl)c1Br to produce COC(=O)[C@H](CC(C)C)N(C(=O)OCC(Cl)(Cl)Cl)c1noc(C)c1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.