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 tert-butyl (3R)-3-[4-(methylamino)-5-(3-methylidenepentanimidoyl)-2-oxo-1H-imidazol-3-yl]piperidine-1-carboxylate using the IUPAC nomenclature.
user
C20H33N5O3
assistant