9027
We have discovered that ebselen is a competitive inhibitor of Escherichia coli TrxR with a Ki of 0 . 52 +/- 0 . 13 mu M , through reaction with the active site dithiol of the enzyme .
 ebselen, dithiol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ebselen, dithiol