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 N-cyclohexyl-2-(2',6-dioxospiro[5,7-dihydro-1H-pyrazolo[3,4-b]pyridine-4,3'-indole]-1'-yl)acetamide .
user
C21H23N5O3
assistant