You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 2-[2-(4-propylpiperidin-1-yl)pyrimidin-5-yl]-1,3-benzothiazole-6-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H26N4O2S
assistant