Using Oc1ccccn1, Fc1ccc2ncnc(Nc3ccc(Cl)c(Cl)c3)c2c1 to produce O=c1ccccn1-c1ccc2ncnc(Nc3ccc(Cl)c(Cl)c3)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.