3 ethyl 2 4 5 trimethylhexane July 8, 2019 16 32 64 128 3-ethyl-2 4 5-trimethylpentane Condensed structural formula for 3 ethyl 2 4 5 trimethylhexane 3 methylhexane 3-ethyl-2 2 5-trimethylhexane 3-ethyl-2 4 5-trimethylheptane 3-ethyl-2 2 3-trimethylheptane