2 2 dimethyl butanoic acid July 8, 2019 16 32 64 128 2 2 dimethyl butanoic acid structure 2 2 methylbutanoic acid 2 2 methylbutanoic acid nmr 2 2 dimethylbutanoic acid formula 2 iodo 2 methylbutanoic acid 2 bromobutane to 2 methylbutanoic acid 2 hydroxy 2 methylbutanoic acid 2 amino 2 methylbutanoic acid 2 3 dihydroxy 2 methylbutanoic acid