You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 1-[(2S)-2-(1,3-benzothiazol-2-yl)pyrrolidin-1-yl]-2-(2-ethylbenzimidazol-1-yl)ethanone ?
user
C22H22N4OS
assistant