You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 8-[(3R)-3-aminopiperidin-1-yl]-7-but-2-ynyl-1-[(4-fluoro-2,1,3-benzothiadiazol-6-yl)methyl]-3-methylpurine-2,6-dione into molecular formula.
user
C22H23FN8O2S
assistant