| 1. | The bitter substances are primarily the two sesquiterpene lactones lactucin and lactucopicrin.
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| 2. | Chemically, artemisinin is a sesquiterpene lactone containing an unusual peroxide bridge.
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| 3. | The toxic compounds are sesquiterpene lactones called hymenovin and hymenoxon.
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| 4. | The oil consists primarily of sesquiterpene hydrocarbons; its main component is caryophyllene.
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| 5. | An example of the sesquiterpene that has been isolated and characterized is oplapanone.
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| 6. | It is a mixture of two isomeric sesquiterpene lactones, alantolactone and isoalantolactone.
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| 7. | Essential oils include terpenoids, benzyl benzoates, allylphenols, and guaianolidous sesquiterpene lactones.
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| 8. | Capnellene is also a sesquiterpene, a class of terpenes that are natural semiochemicals.
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| 9. | It is a sesquiterpene and a ketone.
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| 10. | The transcription of sesquiterpene synthases was shown to begin on the third day following insect attack.
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