Using CCCCN=C=O, COC(=O)c1ccc(CNCCN(C)C)cc1 to produce CCCCNC(=O)N(CCN(C)C)Cc1ccc(C(=O)OC)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.