You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-(azepan-1-yl)-5-(trifluoromethyl)-N-[5-(trifluoromethyl)pyridin-3-yl]pyridine-3-carboxamide into its molecular formula.
user
C19H18F6N4O
assistant