1,2-dimethyl-cyclopentene, 1,2-Dimethyl-cyclopenten, trans-1,2-Dimethylcyclopentan, Santensaeure, 1,2-Dimethyl-cyclopentan-1,3-dicarbonsaeure, 1,2-Dimethyl-cyclopentan, Cyclopentene, 1,2-dimethyl-, dimethylcyclopentylene, dimethylcyclopentane, 1,2-dimethyl-cyclopentane, 1,2-dimethyl transcyclopentane