You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(Z)-3-(1,3-benzothiazol-2-yl)-N-(2-oxo-1,3-dihydroindol-5-yl)prop-2-enamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H13N3O2S
assistant