You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[1-(cyclopentanecarbonyl)pyrrolidin-3-yl]-2-methyl-3-[2-[4-(trifluoromethyl)phenoxy]ethyl]guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H30F3IN4O2
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