You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl (1R,2R,3R,5S)-3-(4-chlorophenyl)-8-methyl-8-azabicyclo[3.2.1]octane-2-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H20ClNO2
assistant