You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-N-(2,4-dimethylphenyl)-2-[[5-(3-fluoroanilino)-1,3,4-thiadiazol-2-yl]sulfanyl]propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H19FN4OS2
assistant