You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(6-bromo-3,4-dihydro-2H-chromen-4-yl)-2-(3-bromophenyl)cyclopropane-1-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H17Br2NO2
assistant