You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-amino-N-[2-(2,5-difluoro-4-piperidin-1-ylphenyl)ethyl]-5-fluoro-6-methoxythieno[2,3-b]pyridine-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H23F3N4O2S
assistant