dilithium 6,6'-[(9,10-dihydro-4,8-dihydroxy-9,10-dioxo-1,5-anthrylene)diimino]bis[toluene-3-sulphonate]

2,2'-[[(9,10-Dihydro-4,8-dihydroxy-9,10-dioxoanthracene)-1,5-diyl]diimino]bis(5-methylbenzenesulfonic acid)dilithium salt