You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-bromo-1-[1-[(6-chloropyridin-3-yl)methyl]-3-hydroxyimidazo[1,2-a]pyridin-4-ium-2-yl]ethanone into its molecular formula.
user
C15H12BrClN3O2+
assistant