2 4 dihydroxy 3 3 dimethylbutanoic acid July 8, 2019 16 32 64 128 2 3-dihydroxy-2-methylbutyrate 2 4-dihydroxy-n-(3-hydroxypropyl)-3 3-dimethylbutanamide 2 3-dihydroxy-3-methylbutanoate 2 4-dihydroxy-3-methylbenzoic acid