You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-(6-bromo-5-methylpyridin-3-yl)-10-chloro-7-pentan-3-yl-3,4,5,6-tetrahydro-2H-[1,3]diazepino[1,2-a]benzimidazol-6-ium into molecular formula.
user
C22H27BrClN4+
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