Using N#CCBr, COc1cc2c(Nc3ccc(Cl)c(Cl)c3)ncnc2cc1O to produce COc1cc2c(Nc3ccc(Cl)c(Cl)c3)ncnc2cc1OCC#N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.