You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2-[(5-anilino-1,3,4-thiadiazol-2-yl)sulfanyl]-N-cyclopropyl-2-(4-fluorophenyl)acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H17FN4OS2
assistant