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-[(2-ethoxy-4-methylphenyl)methyl]-1-ethyl-3-[4-(2-oxopyridin-1-yl)butyl]guanidine;hydroiodide into molecular formula.
user
C22H33IN4O2
assistant