Using CCOC(=O)CC(C)=O, CC(C)(C)OC(=O)N1CCNCC1 to produce CCOC(=O)CC(C)N1CCN(C(=O)OC(C)(C)C)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.