Using CNC(=N)NN, O=C(C=Cc1ccc(Cl)cc1)C=Cc1ccc(Cl)cc1 to produce CNC(=N)NN=C(C=Cc1ccc(Cl)cc1)C=Cc1ccc(Cl)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.