You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2S)-2-acetyloxy-2-[(2S,3S,4S,5S,6R)-3,4,5-triacetyloxy-6-methoxyoxan-2-yl]ethyl] acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H26O12
assistant