You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 15-dibenzofuran-4-ylspiro[10lambda6-thiapentacyclo[12.9.0.02,11.04,9.018,23]tricosa-1(14),2(11),4,6,8,12,18,20,22-nonaene-3,9'-fluorene] 10,10-dioxide into its molecular formula.
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C46H30O3S
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