7355-21-7

(7e)-7-[[2-methoxy-4-[3-methoxy-4-[[4-[(2e)-2-(1-oxo-3,8-disulfonaphthalen-2-ylidene)hydrazinyl]naphthalen-1-yl]diazenyl]phenyl]phenyl]hydrazinylidene]-8-oxonaphthalene-1,6-disulfonic Acid