You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(E)-3-[4-(2-oxopyrrolidin-1-yl)phenyl]prop-2-enoyl]-N-phenylpiperidine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H27N3O3
assistant