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-N'-(5-chloro-2-methylphenyl)-1-N-[2-(4-chlorophenyl)ethyl]cyclopropane-1,1-dicarboxamide .
user
C20H20Cl2N2O2
assistant