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Antioxidant Activity and Total Phenolics of Plants Used in Traditional Medicine in Ecuador
1 , 1 , 1 , 2 , * 1 , 1
1  Laboratorio de Síntesis Orgánica, Universidad de Talca, Chile
2  Laboratorio de Biotecnologia de Productos Naturales, Universidad del Azuay, Cuenca, Ecuador

Abstract: Medicinal plants are organisms that are naturally endowed with chemical compounds (secondary metabolites) with properties of high therapeutic value, yielding advances in the development of synthetic drugs with physiological action beneficial to humans (ref). The use of these plants has an ancient origin in different cultures around the world and their preparation is basically in the form of extracts and teas. Medicinal plants that have a significant amount of phenolic compounds are of great interest since these compounds are attributed various activities; the most relevant is antioxidant activity, which is important in countering oxidative stress (Huie, 2002). Oxidative stress arises mainly as consecuence of the overproduction of free radicals due to inbalance in production of antioxidants by the cells (Emilien et al, 2000). Natural products especially from plant sources have the ability to reduce oxidative stress by acting as antioxidant (Irshad et al, 2012), therefore, in this work we determined the total content of phenolic compounds and antioxidant activity was evaluated of six plants used in traditional medicine for Ecuadorian indigenous ethnicities. The species collected in this study were: Potalia amara, Salvia corrugata Vahl, Ilex guayusa Loes, Scoparia dulcis, Monnina sp and Alternanthera porrigens.
Keywords: Medicinal plants; Oxidative Stress, Antioxidant
Comments on this paper
Julio A. Seijas
flavonoid identity?
interesting communication, did you check your results with those of:

Phenolic glycosides from Potalia amara

By Li, Xing-Cong; ElSohly, Hala N.; Walker, Larry A.; Clark, Alice M.
From Planta Medica (2005), 71(10), 977-979.

Abstr. Investigation of the stem bark of the unique Amazonian herbal plant Potalia amara yielded 2 new phenolic glycosides, potalioside A and B, along with di-​O-​methylcrenatin (3)​, 2,​6-​dimethoxy-​4-​hydroxyphenol 1-​glucoside and sweroside. The structures of potalioside A and B were established by interpretation of spectral data as 4-​hydroxymethyl-​2,​6-​dimethoxyphenyl 1-​O-​β-​D-​glucopyranosyl(1→6)​-​β-​D-​glucopyranoside and 4-​hydroxymethyl-​2,​6-​dimethoxyphenyl 1-​O-​β-​D-​xylopyranosyl(1→6)​-​β-​D-​glucopyranoside, resp

I have no access to this article, but as it is the only article on this plant, it would be very interesting to know which are the flavonoid present

David Mauricio Ramírez Sánchez
Traditional medicine
In all kind of cultures, the traditional medicine is the most
important way to treat all kind of diseases, for this reason is very
important study the activity of the molecules involved in the
biological activity of a compound. The ethnopharmacy helps to
understand how the people use natural resources in their daily. 
Always is very interesting study the natural resources, and the
antioxidant agents are very important in all kind of biological