3-Cyclopropyl-2-methyl-4-oxo-2-cyclopenten-1-yl 2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylate 51921-93-8 Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methyl-1-propenyl)-, 3-cyclopropyl-2-methyl-4-oxo-2-cyclopenten-1-yl ester