[Na+].[Na+].NC1=C(C=C(C2=CC=CC=C12)S([O-])(=O)=O)\N=N\C1=CC=C(C=C1)C1=CC=C(C=C1)\N=N\C1=C(N)C2=CC=CC=C2C(=C1)S([O-])(=O)=O