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The estrogen antagonist ICI182780 prevented the increased MnSOD expression and also the changes in cell growth and stress resistance , indicating that these effects are mediated by estrogen receptors ( ER ) .
 Chemical: estrogen; Chemical: ICI182780; Chemical: estrogen
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: estrogen; Chemical: ICI182780; Chemical: estrogen