InChI=1/C6H12/c1-3-6-4-5(6)2/h5-6H,3-4H2,1-2H3/t5-,6+/m1/s cyclopropane, 1-ethyl-2-methyl-, (1S,2R)- rel-(1R,2S)-1-ethyl-2-methylcyclopropane