Using O=C(O)c1nc[nH]n1, CC(C)(C)c1ccccc1N1CCNCC1 to produce CC(C)(C)c1ccccc1N1CCN(C(=O)c2nc[nH]n2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.