You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 3-(1,2,3,3a,4,6,7,7a-octahydropyrrolo[3,4-c]pyridin-5-ylsulfonylmethyl)benzoate;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H23ClN2O4S
assistant