You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[2-(diethylamino)-4-methylpentyl]-1-ethyl-3-[3-(oxolan-3-ylmethoxy)propyl]guanidine;hydroiodide into molecular formula.
user
C21H45IN4O2
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