You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-bromo-2-[(1E)-1-(methylideneamino)buta-1,3-dien-2-yl]-2,3-dihydrochromen-4-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H12BrNO2
assistant