Using FC(F)(F)c1cccnc1N1CCNCC1, COCc1nc(Cl)cc(Cl)n1 to produce COCc1nc(Cl)cc(N2CCN(c3ncccc3C(F)(F)F)CC2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.