23125
Intracerebroventricular pretreatment with naloxone attenuated the renal ischemia / reperfusion - induced increase in the number of the Fos family proteins positive cells in these areas .
 naloxone
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 naloxone