You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,2R,6R,7S)-2,6-dibromo-4-oxatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C9H6Br2O3
assistant