2-ethyhyl-2,5,12-trihydroxy-1,2,3,4-tetrahydronaphthacene-6,11-dione

8-acetyl-8-bromo-6,11-dihydroxy-7,8,9,10-tetrahydro-5,12-naphthacenedione

苯酐

2,3-二甲基奎札因

2,3-二甲基氢醌