6018
To investigate the role of mGluR8 in modulating the synaptic responses of retinal ganglion cells , we used a recently identified positive allosteric modulator of mGluR8 , AZ12216052 ( AZ ) and the mGluR8 - specific orthosteric agonist ( S ) - 3 , 4 - dicarboxyphenylglycine ( DCPG ) .
 Chemical: AZ12216052; Chemical: ( S ) - 3 , 4 - dicarboxyphenylglycine; Chemical: DCPG
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: AZ12216052, ( S ) - 3 , 4 - dicarboxyphenylglycine, DCPG 
Answer:
 Chemical: AZ12216052; Chemical: ( S ) - 3 , 4 - dicarboxyphenylglycine; Chemical: DCPG