20430
Psychoactive compounds , such as N - methyl - D - aspartate receptor ( NMDAR ) antagonists , modify gamma ( 40 - 90 ) and high frequency oscillations ( HFO , 130 - 180 Hz ) in local field potentials ( LFPs ) recorded in the NAc .
 Chemical: N - methyl - D - aspartate
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: N - methyl - D - aspartate