You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-ethyl-N'-(2-methyl-3-morpholin-4-ylpropyl)-2-oxa-7-azaspiro[4.4]nonane-7-carboximidamide;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H35IN4O2
assistant