Using O=C1CCOCC1, CC(C)(C)OC(=O)N[C@@H]1CCNC1 to produce CC(C)(C)OC(=O)N[C@@H]1CCN(C2CCOCC2)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.