2,6-Anthracenedisulfonic acid, 9,10-dihydro-1,5-dihydroxy-4, 8-dinitro -9,10-dioxo-

disodium 9,10-dihydro-1,5-dihydroxy-4,8-dinitro-9,10-dioxoanthracene-2,6-disulphonate

9,10-Dihydro-1,5-dihydroxy-4,8-dinitro-9,10-dioxo-2,6-anthracenedisulfonic acid disodium salt

1,5-Dihydroxy-4,8-dinitro-9,10-dihydro-9,10-dioxoanthracene-2,6-disulfonic acid disodium salt