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The group III metabotropic glutamate ( mGlu ) receptors ( mGlu ( 4 , 7 ) and ( 8 ) receptors ) in particular are beginning to show promise in this respect .
 Chemical: glutamate
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: glutamate