Using CCOC(=O)Cn1cc2c(n1)-c1cc(Cl)ccc1S(=O)C2 to produce O=C(O)Cn1cc2c(n1)-c1cc(Cl)ccc1S(=O)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.