[Na+].[Na+].[Na+].[Na+].[Cu++].[Cu++].NC1=C2C([O-])=C(\N=N/C3=C([O-])C=C(C=C3)C3=CC([O-])=C(C=C3)\N=N/C3=C([O-])C4=C(N)C=C(C=C4C=C3S([O-])(=O)=O)S([O-])(=O)=O)C(=CC2=CC(=C1)S([O-])(=O)=O)S([O-])(=O)=O