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system
Name the molecular formula for the molecule established as [5,17-ditert-butyl-8,14-bis(2-pyridin-2-ylphenyl)-8,14-diaza-1-borapentacyclo[11.7.1.02,7.09,21.015,20]henicosa-2(7),3,5,9,11,13(21),15(20),16,18-nonaen-11-yl]-trimethylsilane using the IUPAC nomenclature.
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C51H51BN4Si
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