Using CCC(O)C1C(O)CCC12CCN(C(=O)OC(C)(C)C)CC2 to produce CCC(=O)C1C(=O)CCC12CCN(C(=O)OC(C)(C)C)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.