InChI=1/C8H17NO4/c1-11-7(12-2)5-4-6(9)8(10)13-3/h6-7H,4-5,9H2,1-3H3/t6-/m0/s L-norvaline, 5,5-dimethoxy-, methyl ester methyl 5,5-dimethoxy-L-norvalinate