You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[5-[1-[4-(4-ethylphenyl)piperidin-1-yl]ethenyl]-2-methylphenyl]-2-pyrrolidin-1-ylpyridine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H37N3
assistant