You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 7-[2-cyanoethyl(2-methoxyethyl)sulfamoyl]-7-azabicyclo[2.2.1]heptane-2-carboxylic acid into molecular formula.
user
C13H21N3O5S
assistant