You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-(difluoromethyl)benzimidazol-2-yl]methyl 2-(4-bromo-2-methylphenyl)sulfanylacetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H15BrF2N2O2S
assistant