methyl 4,7-dimethoxy-1-oxo-2,3-dihydro-1H-indene-2-carboxylate

6,11-dihydroxy-8-methyl-7,10-dihydrotetracene-5,12-dione

9,10-dihydro-6,11-dihydroxy-8-methyl-5,12-naphthacenedione

1,2,6,11-Tetrahydro-3-methyl-6,11-dioxo-5,12-naphthacenediol 5,12-diacetate

2-acetyl-4,11-dihydroxy-2,3-dihydro-1H-cyclopenta[b]anthracene-5,10-dione