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 2-[3-(2-methyl-6-oxopyridin-1-yl)propanoyl]-7-propan-2-yl-2,7-diazaspiro[4.5]decan-6-one .
user
C20H29N3O3
assistant