Using O=CNc1nc(S(=O)(=O)Cl)n[nH]1, Nc1c(F)cccc1F to produce O=CNc1nc(S(=O)(=O)Nc2c(F)cccc2F)n[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.