methyl 1,2,3,4,5,12-hexahydro-5,12-dioxonaphthacene-2-carboxylate

cis-7-hydroxy-9-carbomethoxy-9-hydroxy-7,10-dihydro-6,11-hydroxy-5,12-naphthacenedione

methyl 6',11'-diacetoxy-1',2',3',4',5',5a',6',11',11a',12'-decahydro-5',12'-dioxospiro<1,3-dithiolan-2,1'-naphthacene>-3'-carboxylate

(1S)-cis-3-acetoxymethyl-1,2,3,4,6,11-hexahydro-1,3,5,12-tetrahydroxy-6,11-dioxonaphthacene