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 (3S)-N-cyclopropyl-1-[1-(1-methyl-6-oxopyridine-3-carbonyl)piperidin-4-yl]piperidine-3-carboxamide using the IUPAC nomenclature.
user
C21H30N4O3
assistant