You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,11S,12R,14S,16R)-11-(4-bromobenzoyl)-14-phenyl-9,10-diazatetracyclo[8.6.0.02,7.012,16]hexadeca-2,4,6,8-tetraene-13,15-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H19BrN2O3
assistant