Using CCOC(=O)CN1CC(O)CN(c2c(Cl)cc(Cl)cc2Cl)S1(=O)=O to produce CCOC(=O)CN1CC(=O)CN(c2c(Cl)cc(Cl)cc2Cl)S1(=O)=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.