You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R)-N-(6-methyl-1,3-benzothiazol-2-yl)-5-oxo-1-phenylpyrrolidine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H17N3O2S
assistant