1,1-Dimethylethylene oxide 1,2-Epoxy-2-methylpropane 1,2-Isobutylene oxide 2,2-Dimethyloxirane 2-Methyl-1,2-epoxypropane 2-Methyl-1-propene oxide 558-30-5 Isobutene oxide Isobutylene epoxide Isobutylene oxide NSC24249 Oxirane, 2,2-dimethyl- Propane, 1,2-epoxy-2-methyl-