You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[1-(2-acetamido-3-phenylprop-2-enoyl)piperidin-4-yl]-1-methylpyrazole-4-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H25N5O3
assistant