You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (6Z)-9-(4-chlorophenyl)sulfonyl-6-(hydroxymethylidene)-7-oxo-9-azabicyclo[3.3.1]nonane-3-carboxylate;ethyl 9-(4-chlorophenyl)sulfonyl-7-oxo-9-azabicyclo[3.3.1]nonane-3-carboxylate;methane is the IUPAC name of a molecule. Please give its molecular formula.
user
C37H48Cl2N2O11S2
assistant