You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 2-(3-bromo-1,8a-dihydroimidazo[1,2-a]pyridin-2-yl)-2-[(2-methylpropan-2-yl)oxy]acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C14H19BrN2O3
assistant