You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-[(E)-1-[4-[2-[4-[(E)-N-(diaminomethylideneamino)-C-methylcarbonimidoyl]phenyl]ethyl]phenyl]ethylideneamino]guanidine;dihydrochloride .
user
C20H28Cl2N8
assistant