Using CCOC(=O)CN(C1CC1)S(=O)(=O)c1c(Cl)cc(Cl)cc1Cl to produce O=C(O)CN(C1CC1)S(=O)(=O)c1c(Cl)cc(Cl)cc1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.