5,7,8-trimethoxy-3,4-dihydro-2H-naphthalen-1-one

2-hydroxy-3-(N-piperidinomethylene)-5,7,8-trimethoxy-1,4-naphtoquinone

3,7,8,10-tetramethoxy-1-methyl-6H-benzo[b]xanthene-6,11(12H)-dione

3-Hydroxy-2-(2-hydroxy-4-methoxy-6-methyl-benzyl)-5,6,8-trimethoxy-[1,4]naphthoquinone

1,3,4,10-Tetramethoxy-8-methyl-7H-benzo[c]xanthene-5,6-dione