You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(3S,4S,5R,6R)-4,5-diacetyloxy-6-[6-(6-cyanopyridin-3-yl)-2-fluoropyridin-3-yl]oxythian-3-yl] acetate into its molecular formula.
user
C22H20FN3O7S
assistant