Using CCCCCC(=O)OC[C@@](C)(CO)NC(=O)OC(C)(C)C to produce CCCCCC(=O)OC[C@@](C)(C=O)NC(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.