You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(6,7-dihydro-[1,4]dioxino[2,3-f][1,3]benzothiazol-2-yl)-4-(4-methyl-2-oxo-1H-imidazol-3-yl)benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H16N4O4S
assistant