You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-bromo-3-methoxyphenyl)-5-chloro-[1,2,4]triazolo[1,5-a]pyrimidin-7-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C12H9BrClN5O
assistant