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The activities of superoxide dismutase , catalase and glutathione peroxidase were found significantly higher in combined treated than untreated rats .
 Chemical: superoxide; Chemical: glutathione
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: superoxide; Chemical: glutathione