2934
A suite of biomarkers including acetylcholinesterase , ethoxyresorufin O - deethylase , glutathione S - transferase , glutathione peroxidase and superoxide dismutase activities in fish after 7 , 14 , 21 and 28 days of exposure in situ , as well as pharmaceuticals and metals in water , were determined during the field exposure period .
 Chemical: ethoxyresorufin; Chemical: O; Chemical: glutathione; Chemical: S; Chemical: glutathione; Chemical: superoxide
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: ethoxyresorufin; Chemical: O; Chemical: glutathione; Chemical: S; Chemical: glutathione; Chemical: superoxide