You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[4-(piperidin-1-ylmethyl)pyridin-2-yl]oxybut-2-enyl]isoindole-1,3-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H25N3O3
assistant