You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 14-phenyl-5-[2-(9,9'-spirobi[fluorene]-2-yl)phenyl]-9-thia-15-azapentacyclo[11.8.0.02,10.03,8.016,21]henicosa-1(13),2(10),3(8),4,6,11,14,16,18,20-decaene into molecular formula.
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C56H33NS
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