Using OB(O)c1cccc(Cl)c1, COCc1nc(Cl)cc(N2CCN(c3ncccc3C(F)(F)F)CC2)n1 to produce COCc1nc(-c2cccc(Cl)c2)cc(N2CCN(c3ncccc3C(F)(F)F)CC2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.