Using O=C(CCCCOC1=CC(=O)C(=O)c2ccccc21)OCc1ccccc1 to produce O=C(O)CCCCOC1=CC(=O)C(=O)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.