19693
Areas covered : This review covers the patent applications which were published between April 2009 and December 2012 on PAMs of the mGlu2 , and it is a continuation of an earlier review published in this journal .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None