You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-N-[2-(2,4-difluorophenyl)-2-hydroxyethyl]piperidine-4-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H19ClF5N3O2
assistant