Using CCOC(=O)C(CCCCCCOCc1ccccc1)CCCCCCOCc1ccccc1 to produce O=C(O)C(CCCCCCOCc1ccccc1)CCCCCCOCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.