1,4-dioxo-1,2,3,4-tetrahydro-5,9,10-trihydroxyanthracene(leuco 1,4,5-trihydroxy-9,10-anthraquinone)

2-(2'-Methoxybenzoyl)-6-methoxybenzoic acid

3-methoxy-2-(2-methoxybenzoyl)benzoic acid

1,2-二氨基蒽醌

(5-acetyloxy-9,10-dioxoanthracen-1-yl) acetate