different between heptacosane vs heptacosadiene

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heptacosane (plural heptacosanes)

(organic chemistry) Any of very many isomers of the saturated aliphatic hydrocarbon having twenty-seven carbon atoms, but especially n-heptacosane (CH₃(CH₂)₂₅CH₃)

heptacosadiene (plural heptacosadienes)

(organic chemistry) Any of very many isomeric dialkenes having twenty-seven carbon atoms and two double bonds, but especially (Z,Z) 7,11-heptacosadiene which is a courtship pheromone in fruit flies

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