Using NCCN, O=C(O)c1cc(-c2ccnc(Nc3cccc(Cl)c3)n2)ccn1 to produce NCCNC(=O)c1cc(-c2ccnc(Nc3cccc(Cl)c3)n2)ccn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.