You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(1-cyclopentylpyrazol-3-yl)methyl]-2-methyl-3-[(3-methyl-4-methylsulfonylphenyl)methyl]guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H30IN5O2S
assistant