You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(2-chlorophenyl)methyl]-3-ethyl-1-methyl-2-[3-(oxolan-2-ylmethoxy)propyl]guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H31ClIN3O2
assistant