9-hydroxy-5-methoxy-2-methylanthracene-1,4-dione

5-Acetoxy-1,4,4a,9a-tetrahydro-8-hydroxy-1-methoxy-1,4-ethano-9,10-anthrachinon

5-Acetoxy-8-ethoxy-1,4,4a,9a-tetrahydro-1-methoxy-1,4-ethano-9,10-anthrachinon

11-isopropylidene-5-methoxy-2-methyl-9,10-dihydro-9,10-methanoanthracene-1,4-dione

9-acetoxy-5-methoxy-2-methylanthracene-1,4-dione