Using C[C@@H]1CN(c2ccc(Nc3cc(Br)cn(C)c3=O)nc2)CCN1C(=O)OC(C)(C)C to produce C[C@@H]1CN(c2ccc(Nc3cc(Br)cn(C)c3=O)nc2)CCN1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.