You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[1-[4-(cyclopropanecarbonylamino)phenyl]ethyl]-2-(difluoromethylsulfanyl)pyridine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H19F2N3O2S
assistant