Using O=c1c(-n2ccnc2)c[nH]n1-c1cc(Cl)ncn1, CC1CNC1 to produce CC1CN(c2cc(-n3[nH]cc(-n4ccnc4)c3=O)ncn2)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.