You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-(3-fluoro-4-methoxyphenyl)sulfonyl-1,2,3,3a,4,6,7,7a-octahydropyrrolo[3,4-c]pyridine;hydrochloride is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H20ClFN2O3S
assistant