You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[[N-[[2-(difluoromethoxy)-5-methoxyphenyl]methyl]-N'-methylcarbamimidoyl]amino]-N-(2,3,4-trifluorophenyl)acetamide into molecular formula.
user
C19H19F5N4O3
assistant