You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 1-(2,3-dihydro-1,4-benzodioxin-6-yl)-2-(2,3-dimethylimidazol-3-ium-1-yl)ethanone;bromide .
user
C15H17BrN2O3
assistant