You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-[3,5-bis(trifluoromethyl)phenyl]-1-(7,7-dimethyl-2-oxo-1-bicyclo[2.2.1]heptanyl)methanesulfonamide .
user
C18H19F6NO3S
assistant