You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R)-2-acetyloxy-2-[(2S,3S,4R,5S)-3-acetyloxy-4,5-dimethoxyoxolan-2-yl]ethyl] acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C14H22O9
assistant