[Na+].[Na+].[Na+].[Na+].COC1=C(C=CC(=C1)C1=CC(OC)=C(C=C1)\N=N\C1=C([O-])C2=C(N)C=C(C=C2C=C1S(O)(=O)=O)S([O-])(=O)=O)\N=N\C1=C([O-])C2=C(N)C=C(C=C2C=C1S(O)(=O)=O)S([O-])(=O)=O