You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
11,16-ditert-butyl-21,21-diethyl-20-methyl-10,12,17-triaza-19-azoniaheptacyclo[10.9.2.13,6.02,7.09,22.013,18.019,23]tetracosa-1,7,9(22),10,13(18),14,16,19(23)-octaene is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H43N4+
assistant