30471
In addition , during acute exposure tests performed at the end of the chronic exposure , biofilms chronically exposed to 75 and 150 mu gL ( - 1 ) oxyfluorfen showed a higher CAT activity than controls .
 oxyfluorfen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 oxyfluorfen