8296
Inhibition of cyclooxygenase-2 expression by 4-trifluoromethyl derivatives of salicylate , triflusal , and its deacetylated metabolite , 2-hydroxy-4-trifluoromethylbenzoic acid .
 cyclooxygenase-2
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 cyclooxygenase-2