You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-ylsulfanyl)butanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C14H15N2O2S2-
assistant