2 2 6 trimethylheptane 4 thiol July 8, 2019 16 32 64 128 2 2-dimethyl-6-ethylheptane 2 6-dimethyl-4-heptanol 2 2-dimethylheptane formula 2 6-dimethyl-4-heptanone 2 2-dimethylheptane