.alpha.-Naphthoquinone 1,4-Dihydro-1,4-diketonaphthalene 1,4-Naphthalenedione 1,4-Naphthoquinone 1,4-Naphthylquinone 130-15-4 NSC9583 Usaf cy-10 WLN: L66 BV EVJ p-Naphthoquinone