5 5-diethyl-2 2 4 4-tetramethyloctane July 8, 2019 16 32 64 128 5 5 diethyl 2 2 4 4 tetramethyloctane 5 5 diethyl 2 2 4 4 tetramethyloctane structure 2 methyl 2 butanol 2 5-dimethyl-4-(2-methylpropyl)heptane 4 5-diethyl-2 2-dimethylnonan 4 5-dimethyl