Using O=C(COCc1ccccc1)Oc1ccc(-c2coc3cc(OC(=O)COCc4ccccc4)ccc3c2=O)cc1 to produce O=C(CO)Oc1ccc(-c2coc3cc(OC(=O)CO)ccc3c2=O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.