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 2-cyclopropyl-1'-(5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyridine-3-carbonyl)spiro[5,6-dihydro-3H-cyclopenta[d]pyrimidine-7,3'-piperidine]-4-one .
user
C21H26N6O2
assistant