8594
A new dibenzocyclooctene - type lignan , named schisandrin A1 ( 1 ) , together with nine known lignans ( 2 - 10 ) , was isolated from the stems of Schisandra sphenathera .
 dibenzocyclooctene, lignan, schisandrin A1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 dibenzocyclooctene, lignan, schisandrin A1