Using COc1ccc(C(O)CCCCC(=O)O)cc1, Oc1ccc(O)c2ccccc12 to produce COc1ccc(C(CCCCC(=O)O)C2=CC(=O)c3ccccc3C2=O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.