You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R,3S,5S,6S,7S,8S)-3,5,6,7,8-pentaacetyloxy-2-bicyclo[2.2.2]octanyl] acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H26O12
assistant