3-(2-butenyl)-2-methyl-4-oxo-2-cyclopenten-1-yl 2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopentanecarboxylate 97-12-1 CINERIN 1 Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methyl-1-propenyl)-, 3-(2-butenyl)-2-methyl-4-oxo-2-cyclopenten-1-yl ester