You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-(benzimidazol-1-yl)ethylamino]-3-propan-2-yl-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H25N5OS
assistant