You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-amino-N-[1-(phenylcarbamoyl)piperidin-4-yl]thieno[2,3-d]pyrimidine-5-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H20N6O2S
assistant