trans-1,2-dimethylbenzene, trans-1,2-Dimethyl-cyclopentan, 1,2-dimethyl-2,5-dihydro-1h-phosphole 1-oxide, 1,2r-dimethyl-2,5-dihydro-1H-phosphole 1t-oxide, 1,2-trans-dimethylcyclohexane, trans-1,2-Dimethyl-3-phospholenoxid, trans-1,2-dimethyl-cyclopentane, cis-1,2-Dimethyl-3-phospholinoxid, Cyclopentane, 1,2-dimethyl-, trans-, 1,2-dimethyl-2,5-dihydro-1