You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-[1-[1-(4-methoxy-3-methylphenyl)sulfonylpiperidin-4-yl]piperidin-4-yl]oxypyridine by IUPAC nomenclature, provide its molecular formula.
user
C23H31N3O4S
assistant