You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [(1S,9S)-5,6,9-triacetyloxy-8,11,13-trioxo-12-oxatetracyclo[7.5.2.02,7.010,14]hexadeca-2,4,6,15-tetraen-4-yl] acetate into molecular formula.
user
C23H18O12
assistant