Using COc1ccc(-c2c(C(=O)c3ccccc3)oc3ccccc23)cc1 to produce O=C(c1ccccc1)c1oc2ccccc2c1-c1ccc(O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.