1,4-Naphthalenedione, 2,3-dihydroxy- 1,4-Naphthoquinone, 2,3-dihydroxy- 2,3-Dihydroxy-1,4-naphthoquinone 2,3-Dihydroxy-1,4-naphthosemiquinone 605-37-8 Isonaphthazarin Isonaphthazarine NSC401107