DOI 10.3390/plants11060769 KEYWORDS 11,12,13-tri-nor-sesquiterpenes; isolation; biosynthesis; biological activity ABSTRACT The compounds 11,12,13-tri-nor-sesquiterpenes are degraded sesquiterpenoids which have lost the C3 unit of isopropyl or isopropenyl at C-7 of the sesquiterpene skeleton. The irregular C-backbone originates from the oxidative removal of a C3 side chain from the C15 sesquiterpene, which arises from farnesyl diphosphate (FDP). The C12-framework is generated, generally, in all […]