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system
Name the molecular formula for the molecule established as [4-[(15S,19S)-16,18-dioxo-17-azapentacyclo[6.6.5.02,7.09,14.015,19]nonadeca-2,4,6,9,11,13-hexaen-17-yl]phenyl] 4-bromobenzoate using the IUPAC nomenclature.
user
C31H20BrNO4
assistant