4-hydroxy-5,5-dimethylnorleucine InChI=1/C8H17NO3/c1-8(2,3)6(10)4-5(9)7(11)12/h5-6,10H,4,9H2,1-3H3,(H,11,12 norleucine, 4-hydroxy-5,5-dimethyl-