1-Propanesulfonic acid, 3,3',3'',3'''-((9,10-dihydro-9,10-dioxo-1,4,5,8-anthracenetetrayl)tetramino)tetrakis-, sodium salt 3,3',3'',3'''-((9,10-Dihydro-9,10-dioxo-1,4,5,8-anthracenetetrayl)tetramino)tetrakis-1-propanesulfonic acid sodium salt 69657-97-2