Using COc1ccc(COC(=O)c2ccc(OCc3ccc(OC)cc3)c(OCc3ccc(OC)cc3)c2)cc1 to produce COc1ccc(COc2ccc(C(=O)O)cc2OCc2ccc(OC)cc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.