You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[2-[[N-ethyl-N'-[2-(ethylamino)-2-oxoethyl]carbamimidoyl]amino]hexyl]carbamate;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H38IN5O3
assistant