1,4-Naphthoquinone, 2,3-epoxy-2,3-dihydro-2-methyl- (8CI) 15448-59-6 2,3-Epoxy-2,3-dihydro-2-methyl-1,4-naphthoquinone Menadione epoxide Menadione oxide Menadione-2,3-epoxide NSC 65669 Naphth(2,3-b)oxirene-2,7-dione, 1a,7a-dihydro-1a-methyl- (9CI) Vitamin K3 2,3-oxide