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-[9-[(4R)-5,8-difluoro-3,4-dihydro-2H-chromen-4-yl]-7-[3-(dimethylamino)propyl]-8-oxopurin-2-yl]benzimidazole-5-carbonitrile .
user
C27H24F2N8O2
assistant