2019
Alpha ( alpha ) - asarone is a major effective compound isolated from the Chinese medicinal herb Acorus gramineus , which is widely used in clinical practice as an antiepileptic drug ; however , its mechanism of action remains unclear .
 ( alpha ) - asarone
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ( alpha ) - asarone