(4aR,12aS)-6-chloro-11-hydroxy-1,2,3,4,4a,12a-hexahydrotetracene-5,12-dione

1-bromo-6,11-dioxo-1,2,3,4,6,11-hexahydrotetracene-5,12-diyl diacetate

(6,11-dihydroxy-5,12-dioxo-1,2,3,4,4a,12a-hexahydrotetracen-1-yl) acetate