Using N#CN=C(Oc1ccccc1)N1CCN(c2ccnc3cc(Cl)ccc23)CC1, CCN to produce CCNC(=NC#N)N1CCN(c2ccnc3cc(Cl)ccc23)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.