You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-(1H-benzimidazol-2-ylmethyl)-1-(7,7-dimethyl-2-oxo-1-bicyclo[2.2.1]heptanyl)-N-methylmethanesulfonamide .
user
C19H25N3O3S
assistant