You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-methylbutanoyloxy(phenyl)methyl] (2R)-4-(3-acetamidopropylsulfonyloxy)-2-hydroxy-3,3-dimethylbutanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H35NO9S
assistant