You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[2-[[C-[4-(furan-2-carbonyl)piperazin-1-yl]-N-methylcarbonimidoyl]amino]ethyl]-3-methylbenzamide;hydroiodide into molecular formula.
user
C21H28IN5O3
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