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 1-[2-(4-chlorophenyl)ethyl]-3-[[3-(4-chlorophenyl)-1,2,4-oxadiazol-5-yl]methyl]-2-methylguanidine .
user
C19H19Cl2N5O
assistant