You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 2-[[2-[4-(benzenesulfonyl)piperazin-1-yl]acetyl]amino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H29N3O5S2
assistant