You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 8-[(2R)-1-methoxypropan-2-yl]-1-(2-methylpropyl)-3-(pyridin-2-ylmethyl)-1,3,8-triazaspiro[4.5]decane-2,4-dione .
user
C21H32N4O3
assistant