(+/-)-6,9-dihydroxy-4-methoxy-9-(trimethylsilyl)ethynyl-7,8,9,10-tetrahydronaphthacene-5,12-dione

5-hydroxy-7-methoxy-1,2,3,4-tetrahydro-2,6,11-naphthacenetrione

(+/-)-9-acetyl-6,9-dihydroxy-4-methoxy-7,8,9,10-tetrahydronaphthacene-5,12-dione

(+/-)-9-ethynyl-6,9-dihydroxy-4-methoxy-7,8,9,10-tetrahydronaphthacene-5,12-dione

(2S,3S,4S,6R)-6-(((1R,3R)-3,12-dihydroxy-10-methoxy-3-(2-methyl-1,3-dioxolan-2-yl)-6,11-dioxo-1,2,3,4,6,11-hexahydrotetracen-1-yl)oxy)-2-methyl-4-(2,2,2-trifluoroacetamido)tetrahydro-2H-pyran-3-yl 4-nitrobenzoate