10639
To test this hypothesis , rats were subjected to a 7 - day study and were administered the suspected metabolite and two low - potency mPGES - 1 inhibitor analogs , where amide hydrolysis was undetectable in rat hepatocyte experiments .
 amide
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 amide