You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-ethyl-2-[[3-fluoro-4-(4-hydroxypiperidin-1-yl)phenyl]methyl]-3-(thiolan-2-ylmethyl)guanidine;hydroiodide into molecular formula.
user
C20H32FIN4OS
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