Wild daffodils of the section Ganymedes from the Iberian Peninsula as a source of mesembrane alkaloids.

Highlights: [•] The first detailed reporting of the alkaloid composition of Narcissus triandrus. [•] Structural elucidation of 3 mesembrane alkaloids (with GC–MS and NMR data). [•] Conformational analysis of 2-oxoepimesembranol. [•] GC–MS of the alkaloid profile of 18 wild populations (Narcissus sp., Ganymedes). [•] Confirmation of the occurrence of mesembrane alkaloids in all samples analyzed. [Copyright &y& Elsevier]