You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-(6-methyl-1,3-benzothiazol-2-yl)-1-methylsulfonyl-N-(pyridin-3-ylmethyl)piperidine-2-carboxamide into its molecular formula.
user
C21H24N4O3S2
assistant