30412
Novel 7 - oxabicyclo [ 2 . 2 . 1 ] hept - 5 - en - 2 - yl derivatives have been synthesized using boron trifluoride diethyl etherate catalyzed Diels - Alder reaction .
 7 - oxabicyclo [ 2 . 2 . 1 ] hept - 5 - en - 2 - yl, boron trifluoride diethyl etherate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 7 - oxabicyclo [ 2 . 2 . 1 ] hept - 5 - en - 2 - yl, boron trifluoride diethyl etherate