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 (3Z)-3-[(Z)-1-[5-benzyl-1-(4-bromophenyl)-6-oxo-2,5-dihydro-1,2,4-triazin-3-yl]ethylidenehydrazinylidene]-1H-indol-2-one .
user
C26H21BrN6O2
assistant