807
In contrast , glutamate was ineffective up to 0 . 1 nM , excluding that glutamate contamination of commercial NAAG samples is responsible for the reported activity of NAAG at mGluR3 .
 Chemical: glutamate; Chemical: glutamate; Chemical: NAAG; Chemical: NAAG
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; Chemical: glutamate; Chemical: NAAG; Chemical: NAAG