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DHS also markedly increased the activity of antioxidant enzymes , such as superoxide dismutase , catalase , glutathione peroxidase , and glutathione reductase in CCl ( 4 ) - treated rat livers .
 Chemical: superoxide; Chemical: glutathione; Chemical: CCl ( 4 )
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; Chemical: CCl ( 4 )