Using CN, O=C1CC(=O)N(c2ccccc2)c2cc(Cl)ccc2N1 to produce CNC1=Nc2ccc(Cl)cc2N(c2ccccc2)C(=O)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.