You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[5-chloro-3-(4-methylsulfonylphenyl)imidazol-4-yl]-2-fluorophenoxy]ethanol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H16ClFN2O4S
assistant