Using CCOC(=O)C1CCNCC1, CCOC(=O)N1CCCC(=O)CC1 to produce CCOC(=O)C1CCN(C2CCCN(C(=O)OCC)CC2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.