Using NNc1ccc(F)cc1F, O=c1nc(-c2ccccc2O)oc2ccccc12 to produce Oc1ccccc1-c1nc(-c2ccccc2O)n(-c2ccc(F)cc2F)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.