2-[[2-[2-[2-[[1,3-dioxo-1-[(2-oxo-1,3-dihydrobenzimidazol-5-yl)amino]butan-2-yl]diazenyl]phenoxy]ethoxy]phenyl]diazenyl]-3-oxo-N-(2-oxo-1,3-dihydrobenzimidazol-5-yl)butanamide