2,3-Dimethyl-2,3-epoxybutane 2,3-Dimethyl-2-butene oxide 2,3-EPOXY-2,3-DIMETHYLBUTANE 5076-20-0 Butane, 2,3-epoxy-2,3-dimethyl- (8CI) EINECS 225-785-9 NSC 171212 Oxirane, tetramethyl- Tetramethylethylene oxide Tetramethyloxirane