You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[(2-tert-butyloxan-3-yl)methyl]-3-[1-(3-chloropyridin-2-yl)pyrrolidin-3-yl]-2-methylguanidine;hydroiodide into its molecular formula.
user
C21H35ClIN5O
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