You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 5-(4-phenylphenyl)spiro[1-borapentacyclo[10.7.1.02,7.08,20.014,19]icosa-2(7),3,5,8(20),9,11,14,16,18-nonaene-13,9'-fluorene] ?
user
C43H27B
assistant