7401-45-8

(8Z)-7-oxo-8-(2-{4-[2-(2-{4-[(2Z)-2-(2-oxo-3,6-disulfonaphthalen-1(2H)-ylidene)hydrazinyl]phenoxy}ethoxy)ethoxy]phenyl}hydrazinylidene)-7,8-dihydronaphthalene-1,3-disulfonic acid