1-chloro-3,4-dihydroxy-2-methyl-anthraquinone

茜草酸

4-hydroxy-1,2-sulfinyldioxy-anthraquinone

1,3,4-trihydroxy-9,10-dioxo-9,10-dihydro-anthracene-2-sulfonic acid

3,4-dihydroxy-9,10-dioxo-9,10-dihydro-anthracene-1-sulfonic acid