InChI=1/C18H30O3/c1-3-14-18(17(20)21-4-2)15-12-10-8-6-5-7-9-11-13-16(18)19/h3H,1,4-15H2,2H cyclododecanecarboxylic acid, 2-oxo-1-(2-propenyl)-, ethyl ester ethyl 1-allyl-2-oxocyclododecanecarboxylate