19979
These findings suggest that [ ( 18 ) F ] FDG - PET , which is available for clinical trials , may be useful in generating a predictive imaging biomarker for detecting neurotoxicity against NMDA receptor antagonists with the same pharmacological activity as MK - 801 .
 [ ( 18 ) F ] FDG, NMDA, MK - 801
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 [ ( 18 ) F ] FDG, NMDA, MK - 801