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 3-(2-amino-5-chloropyridin-4-yl)-5-methyl-6-[(3S)-3-methyl-2-oxa-8-azaspiro[4.5]decan-8-yl]-2H-pyrazolo[3,4-d]pyrimidin-4-one .
user
C20H24ClN7O2
assistant