4,5-dihydroxy-7-methoxy-9,10-dioxo-9,10-dihydro-anthracene-2-carbonyl chloride

4,5-dihydroxy-7-methoxy-9,10-dioxo-9,10-dihydro-anthracene-2-carboxylic acid amide

4,5-diacetoxy-7-methoxy-9,10-dioxo-9,10-dihydro-anthracene-2-carboxylic acid