You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 2-[[2-[(4-methyl-6-oxo-1H-pyrimidin-2-yl)sulfanyl]acetyl]amino]-4,5,6,7,8,9-hexahydrocycloocta[b]thiophene-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H23N3O4S2
assistant