You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(dimethylamino)-2-(4-methoxyphenyl)ethyl]-3-[2-(furan-2-yl)ethyl]-2-methylguanidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H28N4O2
assistant