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