The ethanolic and acetone extracts of the whole plant of Elephantopus scaber were found to contain ethyl hexadecanoate, ethyl-9,12-octadecadienoate, ethyl-(Z)-9-octadecenoate, ethyl octadecanoate, lupeol, stigmasterol, stigmasterol glucoside, deoxyelephantopin (1) and two new germacranolide sesquiterpene lactones named 17,19-dihydrodeoxyelephantopin (2) and iso-17,19- dihydrodeoxyelephantopin (3) whose stereostructures were determined by spectroscopic methods, comparison with reported data and single-crystal X-ray analysis.
Efstratios Bourtsoukidis, Andrea Pozzer, Jonathan Williams, David Makowski, Josep Penuelas, Vasileios N. Matthaios, Theo Economou, Georgia Lazoglou, Ana María Yáñez‐Serrano, A. C. Nölscher, Jos Lelieveld, Philippe Ciais, Mihalis Vrekoussis, Nikos Daskalakis, Jean Sciare
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