Inuloxins A-D, phytotoxic bi-and tri-cyclic sesquiterpene lactones produced by Inula viscosa: Potential for broomrapes and field dodder management

► Five sesquiterpene lactones were isolated from Inula viscosa. ► Four bi- and tri-cyclic sesquiterpenes were characterized. ► Five phytotoxins could be used to develop natural eco-friendly herbicides.