PARTE UTILIZADA= Used part: Hojas.

ACCIÓN FARMACOLÓGICA= Pharmacological action: Emenagogo, anticongestivo.

COMPOSICIÓN QUÍMICA= Chemical composition: Dried aerial parts of E. subhastatum yielded eriodictyol (5,7,3',4'-tetrahydroxyflavanone), eupafolin (6-methoxy-5,7,3',4'-tetrahydroxyflavone), quercetin, and kaempferol in the ether ext., and quercetin 3-galactoside (hyperoside), quercetin-3-glucoside (isoquercitrin), quercetin-3-rhamnoside (quercitrin), and quercetin-3-rutinoside (rutin) in the EtOAc ext. 

ZONA GEOGRÁFICA= Geografical zone: S. de Brasil, Paraguay, Uruguay, NE de Argentina. 

ÚLTIMOS AVANCES EN LA QUÍMICA Y ACTIVIDADES BACTERIOLÓGICAS EN LAS PLANTAS MEDICINALES= Medicinal plants, last advances on chemistry and bacteria activities on the medicinal herbs

1) The qual. and quant. compn. of the essential oils of three Eupatorium species (Compositae) has been investigated for the first time.  All three species grow spontaneously in the central area of South America.  The essential oils were obtained by steam distn. of leaves and analyzed by GC-MS.  Altogether, 23 components were identified.  alpha-Pinene (11.0-17.0%) was characteristic of all the Eupatorium species studied.  P-Cymene (12.5-24.8%) was also a predominant constituent of E. argentinum Ariza and E. subhastatum Hook, and Arn., while the other important compd. of E. hecatanthum (DC.) Baker was thymyl acetate (10.6%).

1) TOURSARKISSIAN, Martín. Plantas medicinales de Argentina : sus nombres botánicos, vulgares, usos y distribución geográfica. Buenos Aires : Hemisferio Sur, 1980, p.31

2) FERRARO, G. E.; COUSSIO, J. D. Flavonoids from Eupatorium subhastatum. Phytochemistry.1973, vol.12, nº7, p.1825.
 
3) ZYGADLO, J. A.; MAESTRI, D. M.; GUZMAN, C. A. Comparative study of the essential oils from three species of Eupatorium.  Flavour and Fragrance Journal. 1996, vol.11, nº3, p.153-155.