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 (3,6-dichloropyridin-2-yl)-[4-[2-(4-methoxyphenyl)ethyl]piperidin-1-yl]methanone using the IUPAC nomenclature.
user
C20H22Cl2N2O2
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