You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[(2R,3R,4S,5S,6S)-3,4,5-triacetyl-6-[[(2S,3S,4S,5R)-3,4-diacetyl-5-(2-oxopropyl)oxolan-2-yl]oxymethyl]oxan-2-yl]sulfanylacetonitrile into molecular formula.
user
C25H33NO9S
assistant