You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
10-[3-[2-[2-(3,6-diphenylcarbazol-9-yl)-5-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl]-6-phenylpyrimidin-4-yl]phenyl]-8,14-diphenyl-8,14-diaza-1-borapentacyclo[11.7.1.02,7.09,21.015,20]henicosa-2,4,6,9,11,13(21),15,17,19-nonaene is the IUPAC name of a molecule. Please give its molecular formula.
user
C91H59BN8
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