Using CS(=O)(=O)OCC(F)(F)F, COC1CCN(C(=O)c2cc3cc(C(=O)N4CCN(C(C)C)CC4)ccc3[nH]2)CC1 to produce COC1CCN(C(=O)c2cc3cc(C(=O)N4CCN(C(C)C)CC4)ccc3n2CC(F)(F)F)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.