Resumen

ESCOBAR, Zilma et al. PHENOLIC COMPOUNDS FROM BACCHARIS PAPILLOSA SUBSP.PAPILLOSA. Rev. Bol. Quim [online]. 2009, vol.26, n.2, pp.111-117. ISSN 0250-5460.

ABSTRACT Four phenolic compounds Ermanine 1, Isokamferine 2, Drupanine 3 and 5,7,5’,4’- tetrahydroxy- 3-methoxyflavone 4 were isolated from the dry leaves of Baccharis papillosa subsp. papillosa. Their structures were determinate by spectroscopic methods and compared with bibliographic data. The plant material was collected in two different seasons; winter and summer, in both cases we determined the same compounds, but with different yields increasing the quantity of compounds 2, 3 and 4 in summer. In addition, the pure compounds were submitted to an antioxidant evaluation using two methods: ABTS and FRAP determining a potent antioxidant activity for compound 4, a significant antioxidant activity for compound 2 and a weak activity for the compounds 1 and 3

Palabras clave : Baccharis papillosa subsp. papillosa; phenolic compounds; flavonoids; Bolivian Medicinal Plants; antioxidant activity.