You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [(2R,3R,4R,5R)-4-acetyloxy-5-(2-benzamido-6-oxo-1H-purin-9-yl)-2-[(2-sulfanylidene-1,3,2lambda5-oxathiaphospholan-2-yl)oxymethyl]oxolan-3-yl] acetate into molecular formula.
user
C23H24N5O9PS2
assistant