Using COC(=O)OC, COC(=O)c1ccc(C2CCC(=O)CC2)cc1 to produce COC(=O)c1ccc(C2CCC(=O)C(C(=O)OC)C2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.