You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2,3,5,6-tetrafluoro-4-(trifluoromethyl)phenyl]-3-[2-(trifluoromethyl)phenyl]thiourea is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H6F10N2S
assistant