6420-25-3

(3E)-5-amino-3-(2-{4'-[(2E)-2-(8-amino-1-oxo-5-sulfonaphthalen-2(1H)-ylidene)hydrazinyl]-3,3'-dimethylbiphenyl-4-yl}hydrazinylidene)-4-oxo-3,4-dihydronaphthalene-2,7-disulfonic acid