You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(1H-benzimidazol-2-ylsulfanylmethyl)-N'-[2-(trifluoromethyl)phenyl]sulfonylbenzohydrazide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H17F3N4O3S2
assistant