1,4,4a,9a-tetrahydro-8-hydroxy-1-methoxy-6-methyl-1,4-ethano-9,10-anthraquinone

7-(chloromethyl)-1,4-dihydro-8-hydroxy-1-methoxy-6-methyl-1,4-ethano-9,10-anthraquinone

1,4-dihydro-8-hydroxy-7-(hydroxymethyl)-1-methoxy-6-methyl-1,4-ethano-9,10-anthraquinone

ethyl 2-<(1,4,9,10-tetrahydro-8-hydroxy-1-methoxy-6-methyl-9,10-dioxo-1,4-ethano-7-anthryl)methyl>-3-oxobutyrate

2-((5-hydroxy-4-methoxy-7-methyl-9,10-dioxo-1,4,9,10-tetrahydro-1,4-ethanoanthracen-6-yl)methyl)-3-oxobutanoic acid