5-ethyl-2 2 4-trimethylheptane July 8, 2019 16 32 64 128 5 ethyl 2 2 4 trimethylheptane 5 ethyl 2 3 4 trimethylheptane 2 2 5-trimethylheptane 2 4 5-trimethylheptane 2 5-dimethyl-4-(2-methylpropyl)heptane