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 N-[2-(3-methoxyanilino)-2-oxoethyl]-N-methyl-1-(2-methylpropanoyl)piperidine-3-carboxamide using the IUPAC nomenclature.
user
C20H29N3O4
assistant