9-hydroxy-2H-benzo[g]isoquinoline-3,5,10-trione

3-bromo-5-hydroxy-2-methylnaphthalene-1,4-dione

2-(dimethylamino)-5-hydroxynaphthalene-1,4-dione

2-(dimethylamino)-8-hydroxynaphthalene-1,4-dione

1,11-dihydroxy-10-methoxytetracene-5,12-dione