Using CC1(C)CN(CCCl)C1, O=C1NCCN1c1cccc(Cl)c1 to produce CC1(C)CN(CCN2CCN(c3cccc(Cl)c3)C2=O)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.