Using O=[Cr](=O)([O-])O[Cr](=O)(=O)[O-], O=C(CCl)c1ccc2c(c1)Cc1cc(C(=O)CCl)ccc1-2 to produce O=C(CCl)c1ccc2c(c1)C(=O)c1cc(C(=O)CCl)ccc1-2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.