You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-cyclohexyl-3-[[N-ethyl-N'-[(1-ethylcyclobutyl)methyl]carbamimidoyl]amino]propanamide;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H37IN4O
assistant