You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[5-bromo-4-[(Z)-[3-[(4-chlorophenyl)methyl]-2,4-dioxo-1,3-thiazolidin-5-ylidene]methyl]-2-methoxyphenoxy]acetic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H15BrClNO6S
assistant