17308
This is the first time that compounds belonging to the epi series of 2 , 6 - diaryl - 3 , 7 - dioxabicyclo [ 3 . 3 . 0 ] octane type furofuran lignans have been found in Lactuca species .
 Chemical: 2 , 6 - diaryl - 3 , 7 - dioxabicyclo [ 3 . 3 . 0 ] octane; Chemical: furofuran lignans
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: 2 , 6 - diaryl - 3 , 7 - dioxabicyclo [ 3 . 3 . 0 ] octane; Chemical: furofuran lignans