(4S,4aS,12aS)-4-amino-3,11,12a-trihydroxy-10-methoxy-6-methyl-1,12-dioxo-1,4,4a,5,12,12a-hexahydrotetracene-2-carboxamide

tert-butyl ((1S,2S,3S,12aR)-2,6-dihydroxy-3-(hydroxymethyl)-4,7-dimethoxy-11-methyl-5-oxo-1,2,3,5,12,12a-hexahydrotetracen-1-yl)carbamate

tert-butyl ((1S,4aS,12aR)-6-hydroxy-3-(hydroxymethyl)-4,7-dimethoxy-11-methyl-2,5-dioxo-1,2,4a,5,12,12a-hexahydrotetracen-1-yl)carbamate

tert-butyl ((1S,4aS,12aS)-3-formyl-2,4a,6-trihydroxy-7-methoxy-11-methyl-4,5-dioxo-1,4,4a,5,12,12a-hexahydrotetracen-1-yl)carbamate

tert-butyl ((1S,2S,3S,12aR)-2,4,6-trihydroxy-3-(hydroxymethyl)-7-methoxy-11-methyl-5-oxo-1,2,3,5,12,12a-hexahydrotetracen-1-yl)carbamate