Using O=C1C(=Cc2ccc(Cl)c(Cl)c2)C(=O)c2ccccc21, OO to produce O=C1c2ccccc2C(=O)C12OC2c1ccc(Cl)c(Cl)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.