You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-(6-methoxy-1,3-benzothiazol-2-yl)-2-[6-(2-methylpyridin-4-yl)pyridin-3-yl]acetamide .
user
C21H18N4O2S
assistant