You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9-phenyl-4-(13-phenyl-8,21-dioxapentacyclo[20.4.0.02,7.09,14.015,20]hexacosa-1(26),2(7),3,5,9,11,13,15,17,19,22,24-dodecaen-5-yl)carbazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C48H31NO2
assistant