2 ethyl 3 methylbutanoic acid July 8, 2019 16 32 64 128 2 ethyl 3 methylbutanoic acid structure 2 ethyl 3 methylpentanoic acid 2 ethyl 3 methylpentanoic acid structure 2 ethyl 4 hydroxy 3 methylpentanoic acid 2 methyl 2 butanol 2 metil 2 butena + h2