2020
In this study , we have characterized the action of alpha - asarone on the excitability of rat hippocampal neurons in culture and on the epileptic activity induced by pentylenetetrazole or kainate injection in vivo .
 alpha - asarone, pentylenetetrazole, kainate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 alpha - asarone, pentylenetetrazole, kainate