You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[5-[(4-amino-6-oxo-1H-pyrimidin-2-yl)sulfanylmethyl]-1,3,4-oxadiazol-2-yl]sulfanyl]-N-[4-[(2,6-dimethoxypyrimidin-4-yl)sulfamoyl]phenyl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H21N9O7S3
assistant