Using CCCCNC(=O)c1ccc(N2CCC(NC(=O)OC(C)(C)C)CC2)cc1, CCCCNC(=O)c1ccc(N2CCC(N)CC2)cc1 to produce CCN(CC)C(=O)c1ccc(N2CCC(N)CC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.