You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2-methoxyethyl)-6-[4-[(E)-3-phenylprop-2-enyl]piperazin-1-yl]pyridine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H28N4O2
assistant