1143
Rescue of both impaired extinction acquisition and deficient extinction consolidation / retrieval was achieved with prior extinction training administration of valproic acid ( a GABAergic enhancer and HDAC inhibitor ) or AMN082 [ metabotropic glutamate receptor 7 ( mGlu7 ) agonist ] , while MS - 275 or PEPA ( AMPA receptor potentiator ) failed to affect extinction acquisition in S1 mice .
 Chemical: valproic acid; Chemical: AMN082; Chemical: glutamate; Chemical: MS - 275; Chemical: PEPA; Chemical: AMPA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: valproic acid; Chemical: AMN082; Chemical: glutamate; Chemical: MS - 275; Chemical: PEPA; Chemical: AMPA