Using COCN(c1cc(Cl)cnc1C1OC(=O)c2ccccc21)S(=O)(=O)c1ccc(Cl)c(C(F)(F)F)c1 to produce O=C1OC(c2ncc(Cl)cc2NS(=O)(=O)c2ccc(Cl)c(C(F)(F)F)c2)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.