de la Fuente J R, Uriburu M L, Burton G, Sosa V E
Consejo de Investigación, Universidad Nacional de Salta, Argentina.
Phytochemistry. 2000 Dec;55(7):769-72. doi: 10.1016/s0031-9422(00)00288-0.
A population of Parthenium hysterophorus collected in Salta Argentina afforded two ambrosanolides, 2beta-hydroxycoronopilin and 1alpha,2beta,4beta-trihydroxypseudoguaian-6beta,12-olide, as well as five known others. Plants of the fructification from those transplanted from the Puna Argentina at 1200 m over the sea level produced hymenin.