You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methyl-N-[3-[6-(4-methylpiperidin-1-yl)pyridazin-3-yl]phenyl]-5-nitrobenzenesulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H25N5O4S
assistant