You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(4,4-difluorobut-3-enyl)-3-phenyl-1lambda4-thia-2,4-diazacyclopenta-2,5-diene The above is the IUPAC name of a molecule. Write its molecular formula.
user
C12H12F2N2S
assistant