30508
We wanted to determine whether behavioural and GABAergic functional deficits induced by the NMDA receptor channel blocker , phencyclidine ( PCP ) , could be reversed by repeated administration of two drugs known to enhance GABAergic transmission : the positive allosteric modulator ( PAM ) of the metabotropic glutamate receptor 5 ( mGluR5 ) , ADX47273 , and the partial agonist of the alpha 7 nicotinic acetylcholine receptor ( alpha 7 nAChR ) , SSR180711 .
 NMDA, phencyclidine, PCP, glutamate, acetylcholine, SSR180711
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 NMDA, phencyclidine, PCP, glutamate, acetylcholine, SSR180711