You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(10-methoxy-6-oxo-5H-benzo[b][1]benzothiepin-4-yl)-2-[2-(2-methoxyphenyl)sulfanylphenyl]acetic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H24O5S2
assistant