4761-26-6 InChI=1/C11H18O5/c1-4-15-10(13)9(7-6-8(3)12)11(14)16-5-2/h9H,4-7H2,1-3H diethyl (3-oxobutyl)malonate propanedioic acid, (3-oxobutyl)-, diethyl ester