You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-(5,6-dimethyl-1,3-benzothiazol-2-yl)-2-(2,5-dioxopyrrolidin-1-yl)-N-(pyridin-2-ylmethyl)acetamide .
user
C21H20N4O3S
assistant