You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(1-benzylpyrrolidin-2-yl)methyl]-2-[(4,5-dimethyl-1,2,4-triazol-3-yl)methyl]-3-(2-methoxyethyl)guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H34IN7O
assistant