You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-methyl-2-[4-(3-nitrobenzoyl)piperazin-1-yl]-5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-one by IUPAC nomenclature, provide its molecular formula.
user
C22H23N5O4S
assistant