You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[[ethylamino-[[2-(4-propan-2-ylphenyl)cyclopropyl]amino]methylidene]amino]ethyl]cyclopropanecarboxamide;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H33IN4O
assistant