You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 2-(2,3,3a,4,6,6a-hexahydro-1H-pyrrolo[3,4-c]pyrrol-5-ylsulfonyl)benzoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C14H18N2O4S
assistant