List of Articles Viviana Valdez Article 1 - Preliminary phytochemical screening for antioxidant activity and content of phenols and flavonoids of 18 species of plants native to western Ecuador 20.1001.1.25883623.2021.5.2.5.6 10.30495/tpr.2021.1922658.1196 Shirley Moncayo Xavier Cornejo Jhon Castillo Viviana Valdez Trends in Phytochemical Research , Issue 2 , Year , Spring 2021
