Using O=C1OC(c2ccc(O)cc2)(c2ccc(O)cc2)c2ccccc21 to produce O=C(O)c1ccccc1C(c1ccc(O)cc1)c1ccc(O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.