You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3,5-dibromo-4-[(4-pentyl-1,2,3,4-tetrahydroquinolin-6-yl)oxy]phenyl]-methoxy-oxoazanium is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H25Br2N2O3+
assistant