Using O=C(C=C(Nc1ccccc1)Nc1ccccc1)c1cc(F)c(Cl)nc1Cl to produce O=c1cc(Nc2ccccc2)n(-c2ccccc2)c2nc(Cl)c(F)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.