You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methyl (3S,4R)-4-(3-bromo-4-methoxyphenyl)-6-[2-(2-chloroanilino)-2-oxoethyl]sulfanyl-5-cyano-2-oxo-3,4-dihydro-1H-pyridine-3-carboxylate .
user
C23H19BrClN3O5S
assistant