23137
Synthesis and biological evaluation of novel pyrrolidine - 2 , 5 - dione derivatives as potential antidepressant agents .
 pyrrolidine - 2 , 5 - dione
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 pyrrolidine - 2 , 5 - dione