Using CCOC(=O)C1(CCCCC(=O)CCCCC2(C(=O)OCC)CCC2)CCC1 to produce O=C(CCCCC1(C(=O)O)CCC1)CCCCC1(C(=O)O)CCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.