Using O=C(O)CS(=O)(=O)Nc1ccc(F)cc1C(F)(F)F, NCCS(=O)(=O)O to produce O=C(CS(=O)(=O)Nc1ccc(F)cc1C(F)(F)F)NCCS(=O)(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.