Using Nc1cc(Cl)cc(Oc2cncnc2)c1, O=C(Cl)c1cccc(Cl)c1 to produce O=C(Nc1cc(Cl)cc(Oc2cncnc2)c1)c1cccc(Cl)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.