You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[6-[(2,5-dimethylphenyl)sulfonylamino]-4-methyl-1,3-benzothiazol-2-yl]benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H21N3O3S2
assistant