You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[6-(5-bromothiophen-2-yl)pyridazin-3-yl]-N-(3,4,5-trimethoxyphenyl)piperidine-4-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H25BrN4O4S
assistant