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 .
 Chemical: alpha - asarone; Chemical: pentylenetetrazole; Chemical: kainate
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: alpha - asarone, pentylenetetrazole, kainate 
Answer:
 Chemical: alpha - asarone; Chemical: pentylenetetrazole; Chemical: kainate