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 3,5-dichloro-4-[3-(dimethylamino)-4-oxo-6-[(2-oxo-3H-1,3-benzoxazol-5-yl)methyl]-5H-pyrazolo[3,4-d]pyrimidin-1-yl]benzenesulfonamide .
user
C21H17Cl2N7O5S
assistant