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Synergy between L - DOPA and a novel positive allosteric modulator of metabotropic glutamate receptor 4 : implications for Parkinson ' s disease treatment and dyskinesia .
 Chemical: L - DOPA; 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: L - DOPA; Chemical: glutamate