You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-cyclopropyl-5-[(2,4-difluorophenyl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C13H9F2NOS2
assistant