5249
Reduced nociceptive responses in CCR5 KO mice were moderated by administration of naloxone and d - Phe - Cys - Tyr - d - Trp - Arg - Thr - Pen - Thr - NH2 ( CTAP ) , MOR antagonists .
 naloxone, d - Phe - Cys - Tyr - d - Trp - Arg - Thr - Pen - Thr - NH2, CTAP
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 naloxone, d - Phe - Cys - Tyr - d - Trp - Arg - Thr - Pen - Thr - NH2, CTAP