Translate the chemical IUPAC name 17-(4a,9a-dimethyl-1,2,3,4-tetrahydrocarbazol-9-yl)-4-tert-butyl-8-(4-tert-butyl-2-phenylphenyl)-14-dibenzothiophen-4-yl-11-methyl-8,14-diaza-1-borapentacyclo[11.7.1.02,7.09,21.015,20]henicosa-2(7),3,5,9(21),10,12,15(20),16,18-nonaene into its molecular formula.