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 (E)-3-(3-fluoro-4-pyridin-3-yloxyphenyl)-1-[4-[2-(trifluoromethyl)benzoyl]piperazin-1-yl]prop-2-en-1-one ?
user
C26H21F4N3O3
assistant