Lycopene
http://www.chistry.about.com/library/graphics/bllyco2.htm
Lycopene is a carotenoid. Well known carotenoids are either simple unsaturated  hydrocarbons based on lycopene or oxygenated dirivatives. Lycopene consists of a long chain of eight isoprenes joined head to tail. Making a complete conjugated system of alternate double bonds.
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