You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(6,7-dihydro-[1,4]dioxino[2,3-f][1,3]benzothiazol-2-yl)-N-(pyridin-3-ylmethyl)-1,3-benzothiazole-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C23H16N4O3S2
assistant