2 3 4 5-tetramethylhexane structural formula July 8, 2019 16 32 64 128 2 3 4 5-tetramethyl hexane structural formula 3 methylhexane 2 2 5 5-tetramethylhexane structural formula 2 3 5 5-tetramethylhexane 2 methyl 2 butanol