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 pyridin-3-yl-[2-(pyridin-2-ylmethyl)-2,8-diazaspiro[4.5]decan-8-yl]methanone using the IUPAC nomenclature.
user
C20H24N4O
assistant