You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 4-[[2-[(1S,8R,9S)-11-(4-bromophenyl)-8-(2-hydroxyphenyl)-5,10,12-trioxo-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-en-4-yl]acetyl]amino]benzoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H24BrN3O7S2
assistant