18839
Pristimerin suppressed not only the generation of nitric oxide ( NO ) and prostaglandin E2 , but also the expression of inducible NO synthase and cyclooxygenase - 2 induced by lipopolysacharide ( LPS ) in murine macrophage RAW264 . 7 cells .
 Pristimerin, nitric oxide, NO, prostaglandin E2, NO
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Pristimerin, nitric oxide, NO, prostaglandin E2, NO