You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[1-(4,5,6,7-tetrahydro-1,3-benzothiazol-2-ylmethyl)azepan-4-yl]pyridine-4-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H26N4OS
assistant