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 N-(2-methyl-1,3-dioxoisoindol-5-yl)-2-[(5R,9S)-7,7,9-trimethyl-2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl]acetamide .
user
C22H26N4O5
assistant