You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3,4-difluoro-N-[2-[2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-4-yl]ethyl]benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H13F5N2OS
assistant