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