You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-ethyl-3-ethylsulfonyl-4-(1,1,1,2,3,3,3-heptafluoropropan-2-yl)benzoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C14H13F7O4S
assistant