2 4-octadiene July 8, 2019 16 32 64 128 2 4-octadiene-6-yne 2 4-octadien-6-yne 2 4 octadiene structural formula 2 4 6 octadiene 2 methyl 2 4 octadiene 4 5-dimethyl-2 4-octadiene 2 4-octadienal 2 4 octadieno formula 2 4 d amine salt