[Na+].[Na+].[Cu++].OC(=O)C1=C([O-])C=CC(=C1)N=NC1=CC=C(C=C1)C1=CC=C(C=C1)N=NC1=C([O-])C=CC(\N=N\C2=C([O-])C=CC(=C2)S(O)(=O)=O)=C1[O-]