?:definition
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A class of hydrocarbons formed from units of isoprene (C5H8) linked to form chains or rings. A mono-terpene has 2 isoprene units, a sesquiterpene has 3 isoprene units, a diterpene has 4 isoprene units, a sesterpene has 5 isoprene units, a triterpene has 6 isoprene units, a carotenoid has 8 isoprene units, and rubber has >100 isoprene units.
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