三氧化硫

1,3,4,5,7,8-hexahydroxy-9,10-dioxo-9,10-dihydro-anthracene-2,6-disulfonic acid

茜素菁 2R

1,2,6-三羟基蒽-9,10-二酮

1,2,4,6-tetrahydroxyanthracene-9,10-dione