You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
hexafluoroantimony(1-);14-propyl-3-aza-13-azoniapentacyclo[11.8.0.02,10.04,9.016,21]henicosa-1(13),2(10),4,6,8,14,16,18,20-nonaene is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H21F6N2Sb
assistant