You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,5R)-8-[bis(2-chlorophenyl)methyl]-3-(6-bromopyridin-3-yl)-8-azabicyclo[3.2.1]octane-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H24BrCl2N3O
assistant