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 [(3R,3aS,7Z)-3-(4-bromophenyl)-7-[(4-bromophenyl)methylidene]-3a,4,5,6-tetrahydro-3H-indazol-2-yl]-(4-chloro-3-nitrophenyl)methanone .
user