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-[(3,5-dichloro-4-methylpyridin-2-yl)amino]-2-oxoethyl] 3-piperidin-1-ylsulfonylbenzoate .
user
C20H21Cl2N3O5S
assistant