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The aim of this work was to evaluate the protective effect of an aqueous extract of I . paraguariensis ( green leaves ) on the hemolysis of red blood cells induced by hydrogen peroxide and to correlate this activity with the enzymatic activity related to hydrogen peroxide metabolism .
 Chemical: hydrogen peroxide; Chemical: hydrogen peroxide
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: hydrogen peroxide; Chemical: hydrogen peroxide