InChI=1/C13H22O4/c1-6-10(9(4)5)11(12(14)16-7-2)13(15)17-8-3/h6,9-11H,1,7-8H2,2-5H diethyl (1-isopropylprop-2-en-1-yl)malonate propanedioic acid, [1-(1-methylethyl)-2-propenyl]-, diethyl ester