You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[N-[[3,5-dichloro-2-(difluoromethoxy)phenyl]methyl]-N'-methylcarbamimidoyl]amino]-N-(2-methoxyethyl)acetamide;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H21Cl2F2IN4O3
assistant