You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,4R)-2,7,7-trimethyl-1-[[4-[5-(trifluoromethyl)pyridin-2-yl]piperazin-1-yl]sulfonylmethyl]bicyclo[2.2.1]heptan-2-ol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H30F3N3O3S
assistant