You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as [4-[3-(cyclopropylamino)-4-nitrophenyl]piperazin-1-yl]-(3,4-dichlorophenyl)methanone using the IUPAC nomenclature.
user
C20H20Cl2N4O3
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