4 propyl 2 4 5 trimethylheptane July 8, 2019 16 32 64 128 4 propyl 2 3 5 trimethylheptane 2 4 5 trimethyl-3- propylhexan 4 propylheptane 2 3 5 триметил 4 пропилгептан 2 3 5 trimethyl 4 propylheptane structural formula 4 етил 2 метил 4 пропіл гептан