Using CCOC(=O)C1(CCN(C)C)CCN(C(=O)OC(C)(C)C)CC1 to produce CN(C)CCC1(C(=O)O)CCN(C(=O)OC(C)(C)C)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.