disodium 1-amino-9,10-dihydro-4-[[2-methoxy-5-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]amino]-9,10-dioxoanthracene-2-sulphonate

1-Amino-9,10-dihydro-4-[[2-methoxy-5-[[2-[(sodiosulfo)oxy]ethyl]sulfonyl]phenyl]amino]-9,10-dioxo-2-anthracenesulfonic acid sodium salt