You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3-bromo-8-azabicyclo[3.2.1]octan-8-yl)-(2,3-dihydro-1-benzothiophen-3-yl)methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H18BrNOS
assistant