457
In cell based pharmacology assays , GRN - 529 is a high affinity ( Ki 5 . 4 nM ) , potent ( IC50 3 . 1 nM ) and selective ( > 1000 - fold selective vs mGluR1 ) mGluR5 NAM .
 GRN - 529
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 GRN - 529