You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 1-[4-[(E)-3-(1-benzyltriazol-4-yl)prop-2-enoyl]piperazin-1-yl]-2-methylpropan-1-one ?
user
C20H25N5O2
assistant