InChI=1/C9H12O3/c1-12-8(11)9(4-5-9)7(10)6-2-3-6/h6H,2-5H2,1H cyclopropanecarboxylic acid, 1-(cyclopropylcarbonyl)-, methyl ester methyl 1-(cyclopropylcarbonyl)cyclopropanecarboxylate