You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(Z)-3-(furan-2-yl)-1-[4-[(Z)-3-phenylprop-2-enyl]piperazin-1-yl]prop-2-en-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H22N2O2
assistant