You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 9-phenyl-2-(26-phenyl-8,21-dioxapentacyclo[20.4.0.02,7.09,14.015,20]hexacosa-1(26),2,4,6,9,11,13,15,17,19,22,24-dodecaen-6-yl)carbazole by IUPAC nomenclature, provide its molecular formula.
user
C48H31NO2
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