You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-ethyl-N'-[2-(6-fluoro-4H-1,3-benzodioxin-8-yl)ethyl]-2,2,3,3-tetramethylazetidine-1-carboximidamide;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H31FIN3O2
assistant