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 2-methyl-1-[1-(2-methylbutan-2-ylamino)-1-oxopropan-2-yl]piperidine-4-carboxylic acid using the IUPAC nomenclature.
user
C15H28N2O3
assistant