You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[N-(5,5-dimethylhexan-2-yl)-N'-[(4-methoxyphenyl)methyl]carbamimidoyl]amino]-N,N-dimethylacetamide;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H37IN4O2
assistant