You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (6S)-1-bromo-6-phenyl-17-oxapentacyclo[12.4.0.02,7.03,16.08,13]octadeca-3,8,10,12-tetraen-18-one ?
user
C23H19BrO2
assistant