You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-ethyl-3-(phenylmethoxymethyl)-N'-(3,3,3-trifluoropropyl)pyrrolidine-1-carboximidamide;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H27F3IN3O
assistant