InChI=1/C11H19NO2/c1-5-11(4,6-2)9(8-12)10(13)14-7-3/h9H,5-7H2,1-4H ethyl 2-cyano-3-ethyl-3-methylpentanoate pentanoic acid, 2-cyano-3-ethyl-3-methyl-, ethyl ester