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 5-[4-[(6-tert-butylpyridazin-3-yl)oxymethyl]piperidine-1-carbonyl]-1H-pyridin-2-one .
user
C20H26N4O3
assistant