Using OB(O)c1cccnc1, Brc1ccc2c(c1)-c1nc(I)cn1CCO2 to produce Brc1ccc2c(c1)-c1nc(-c3cccnc3)cn1CCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.