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