1,4-Naphthalenedione, 2,3-dimethyl- 1,4-Naphthoquinone, 2,3-dimethyl- 2,3-Dimethyl-1,4-naphthoquinone 2,3-Dimethylnaphthoquinone 2197-57-1 NSC36460 Usaf Sn-29 WLN: L66 BV EVJ C1 D1