3 5-dimethyl-4-propylheptane structure July 8, 2019 16 32 64 128 3 methylhexane 3 3-dimethyl-4-propyl-1 5-octadiene (3r 4as 5r)-4a 5-dimethyl-3-(prop-1-en-2-yl)-1 2 3 4 4a 5 6 7-octahydronaphthalene 3 3-dimethylheptane