Using O=C(O)Cc1cc(C(=O)c2ccc(Cl)cc2)c2occc2c1 to produce O=C([O-])Cc1cc(C(=O)c2ccc(Cl)cc2)c2occc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.