You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[6-[8-chloro-5-[2,2-difluoro-2-(oxetan-3-yl)ethyl]-4,6-dihydro-[1,2,4]triazolo[4,3-a][1,4]benzodiazepin-1-yl]-2-azaspiro[3.3]heptan-2-yl]pyridine-2-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H26ClF2N7O
assistant