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 1,1',3,3'-tetrakis(4-tert-butylphenyl)-5,5',6,6'-tetramethyl-2,2'-spirobi[1,3,2-benzodiazasilole] .
user
C56H68N4Si
assistant