You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-ethylsulfonyl-1-methyl-5-[1-methyl-5-[4-(trifluoromethyl)pyridin-2-yl]-1,2,4-triazol-3-yl]-2-(trifluoromethyl)benzimidazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H16F6N6O2S
assistant