5-amino-8-hydroxy-1,4-dihydro-1,4-methanoanthracene-9,10-dione

8-acetamido-9,10-dioxo-1,4,9,10-tetrahydro-1,4-methanoanthracen-5-yl acetate

8-amino-5-hydroxy-1-methylbenzindazole-4,9-dione

3,3'-Dimethyl-2,2'-bijuglon-dimethylether

8-amino-5-hydroxybenzindazole-4,9-dione