Using Nc1c(F)cc(Br)cc1F, COc1cc2ncnc(Cl)c2cc1OC to produce COc1cc2ncnc(Nc3c(F)cc(Br)cc3F)c2cc1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.