Using FC(F)(F)c1nnc(N2CCNCC2)s1, C=CC(=O)OC to produce O=C([O-])CCN1CCN(c2nnc(C(F)(F)F)s2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.