5775
Oxidative dearomatization of bicyclic phenols affords polycyclic cyclohexadienones that undergo efficient ring expansion to form benzannulated medium - ring scaffolds found in natural products .
 Chemical: bicyclic phenols; Chemical: polycyclic cyclohexadienones
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: bicyclic phenols, polycyclic cyclohexadienones 
Answer:
 Chemical: bicyclic phenols; Chemical: polycyclic cyclohexadienones