You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(15R,19R)-17-(2-chloro-5-nitrophenyl)-1-nitro-17-azapentacyclo[6.6.5.02,7.09,14.015,19]nonadeca-2,4,6,9,11,13-hexaene-16,18-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H14ClN3O6
assistant