7H-isoindolo[2,1-b]isoquinolin-5-one

(6,11-dioxotetracen-5-yl) acetate

2-benzoyl-3-[hydroxy(phenyl)methylidene]-4-oxo-1,2-dihydronaphthalene-1-carboxylic acid

6-hydroxy-1-methoxytetracene-5,12-dione

2-(2-anilino-2-oxoethyl)benzoic acid