Pablo Chacón MoralesCarolina Santiago DugarteJuan M. Amaro2026-03-222026-03-222021http://erevistas.saber.ula.ve/index.php/avancesenquimica/article/download/16890/21921928032https://andeanlibrary.org/handle/123456789/70181From the leaves and stems of Stevia lucida Lagasca (Asteraceae), an equilibrium chalcone-flavanone isomeric mixture, composed of 2',3,4,4',6'-pentahydroxychalcone (8) (eriodictyol-chalcone) and eriodictyol (9) [ratio 8/9 5:3], was isolated as an isomorphic crystal. The mixture was structurally characterized by spectroscopic methods, including 1D- and 2D-NMR experiments. The presence of chalcones in the genus Stevia is reported here for the second time.esEriodictyolChalconeFlavanoneSteviaChemistryStereochemistryBotanyarticle