You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 7-benzoyl-5,6-dihydroxy-3,10-dioxatricyclo[10.2.2.04,9]hexadeca-1(15),4(9),5,7,12(16),13-hexaene-2,11-dione using the IUPAC nomenclature.
user
C21H12O7
assistant