3 methyl 4 butanoic acid July 8, 2019 16 32 64 128 3 methyl 4 oxo butanoic acid 3 methyl 4 formyl butanoic acid 4 hydroxy 3 methyl butanoic acid 3 4 methyl 1 2 methylpropanoyl 3 oxocyclohexyl butanoic acid 3 methylhexane 2 methyl 2 butanol
