You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3,5-dimethyl-1-propan-2-ylpyrazol-4-yl)-4-pyrrolidin-1-ylsulfonylbenzenesulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H26N4O4S2
assistant