5775
Oxidative dearomatization of bicyclic phenols affords polycyclic cyclohexadienones that undergo efficient ring expansion to form benzannulated medium - ring scaffolds found in natural products .
 bicyclic phenols, polycyclic cyclohexadienones
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 bicyclic phenols, polycyclic cyclohexadienones