2-Pentanone, 3,4-epoxy-4-methyl- 3,3-Dimethyl-2-acetyloxirane 3-Acetyl-2,2-dimethyloxirane 4-Methyl-3,4-epoxypentan-2-one 4478-63-1 Epoxymesityl oxide Ethanone, 1-(3,3-dimethyloxiranyl)- NSC139151 WLN: T3OTJ B1 B1 CV1