Using BrBr, C[C@@H]1COCCN1c1nc(N2CCOC[C@@H]2C)nc2[nH]cnc12 to produce C[C@@H]1COCCN1c1nc(N2CCOC[C@@H]2C)nc2[nH]c(Br)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.