Using C[C@H](CBr)NC(=O)OC(C)(C)C, Oc1c(Cl)cccc1Cl to produce C[C@H](COc1c(Cl)cccc1Cl)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.