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-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-N-[2,6-di(propan-2-yl)phenyl]acetamide .
user
C21H32N2O3
assistant