Using O=C(c1ccccc1)c1c(O)cc(-c2ccccc2)oc1=O, COC(OC)OC to produce COC(=O)c1c(-c2ccccc2)oc(-c2ccccc2)cc1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.