You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(3R)-1-[2-(3-methoxyphenoxy)ethyl]-1-azoniabicyclo[2.2.2]octan-3-yl] N-(2-fluorophenyl)-N-[(4-fluorophenyl)methyl]carbamate;bromide is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H33BrF2N2O4
assistant