You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(2-chloro-4-fluorophenyl)-2-[3,5-dimethyl-1-[4-(trifluoromethyl)pyrimidin-2-yl]pyrazol-4-yl]propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H16ClF4N5O
assistant