4,8-Diamino-1,5-dihydroxy-7-(p-methoxyphenyl)-9,10-dihydro-9,10-dioxoanthracene-2-sulfonic acid

4,8-diamino-9,10-dihydro-1,5-dihydroxy-7-(4-methoxyphenyl)-9,10-dioxoanthracene-2-sulphonic acid