You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 1-[2-[(3-bromophenyl)methyl]butyl]-3-[1-(2,2-difluoroethyl)piperidin-4-yl]-2-methylguanidine;hydroiodide .
user
C20H32BrF2IN4
assistant