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 2-(1,2-dimethylpiperidin-3-yl)-5-fluoro-N-(6-fluoro-1,3-benzothiazol-5-yl)thieno[2,3-b]pyridin-4-amine .
user
C21H20F2N4S2
assistant