Using O=[Cr](=O)([O-])O[Cr](=O)(=O)[O-], CC(=O)c1ccc2c(c1)Cc1cc(C(C)=O)ccc1O2 to produce CC(=O)c1ccc2oc3ccc(C(C)=O)cc3c(=O)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.