You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-(8-benzyl-8-azabicyclo[3.2.1]octan-3-yl)-2-methyl-3-[2-(7-methyl-1H-indol-3-yl)ethyl]guanidine;hydroiodide by IUPAC nomenclature, provide its molecular formula.
user
C27H36IN5
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