You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[2-(furan-2-yl)ethyl]-3-(2-hydroxy-2-phenylpropyl)-2-(thiophen-2-ylmethyl)guanidine;hydroiodide into its molecular formula.
user
C21H26IN3O2S
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