Using CS(=O)(=O)OCC(F)(F)F, CCOc1cc(Cc2cnc(N)nc2N)cc(O)c1-c1cccc(N)c1 to produce CCOc1cc(Cc2cnc(N)nc2N)cc(OCC(F)(F)F)c1-c1cccc(N)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.