You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-[2-methyl-3-[9-(2-methylpropyl)-6-[9-(2-methylpropyl)carbazol-3-yl]carbazol-3-yl]propyl]phenyl]-diphenylborane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C54H53BN2
assistant