InChI=1/C9H12O3/c1-3-6-5-7(6)8(10)9(11)12-4-2/h3,6-7H,1,4-5H2,2H3/t6-,7-/m1/s cyclopropaneacetic acid, 2-ethenyl-alpha-oxo-, ethyl ester, (1R,2S)- ethyl rel-oxo[(1R,2S)-2-vinylcyclopropyl]acetate