You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4,6-bis(8,14-dioxa-1-borapentacyclo[11.7.1.02,7.09,21.015,20]henicosa-2,4,6,9,11,13(21),15,17,19-nonaen-11-yl)-5-methyl-[1]benzofuro[3,2-c]carbazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C55H31B2NO5
assistant