1090-13-7 5,12-Naphthacenedione 5,12-Naphthacenequinone 5,12-Tetracenequinone EINECS 214-127-6 NAPHTHACENE-5,12-DIONE NSC 401183 Naphthacene-6,11-quinone Naphthacenequinone Tetracenemonoquinone