TRANS-1,2-DIMETHYLCYCLOPROPANE Cyclopropane, 1,2-dimethyl- cyclopropane,1,2-dimethyl-,trans- t-1,2-Dimethylcyclopropane rel-(1R*)-1β*,2α*-Dimethylcyclopropane rel-(1S*)-1α*,2β*-Dimethylcyclopropane Cyclopropane, 1,2-dimethyl-, (1R,2R)-rel-