You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[2-[[N-ethyl-N'-[2-hydroxy-2-(3-propan-2-yloxyphenyl)ethyl]carbamimidoyl]amino]ethyl]cyclopropanecarboxamide;hydroiodide by IUPAC nomenclature, provide its molecular formula.
user
C20H33IN4O3
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