Using COC(=O)CCc1ccccc1OC, COC(=O)CCCC(=O)O to produce COC(=O)CCCC(=O)c1ccc(OC)c(CCC(=O)OC)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.