2-Ethyl-4,5-dihydroxy-6,11-dioxo-1,2,3,4,6,11-hexahydro-naphthacene-1-carbonitrile

1-methoxy-2-(1'-oxopent-2'-enyl)anthraquinone

1-hydroxy-2-(1'-oxo-2'-selenophenylpentyl)anthraquinone

3-ethyl-12-hydroxy-6,11-dioxo-3,4,6,11-tetrahydro-2H-spiro[tetracene-1,2'-[1,3]dithiane]-4-carbonitrile