You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4'-[25-[3-(2,6-diphenylpyrimidin-4-yl)phenyl]spiro[11-thia-25-azahexacyclo[12.11.0.03,12.05,10.015,24.016,21]pentacosa-1,3(12),5,7,9,13,15(24),16(21),17,19,22-undecaene-4,9'-fluorene]-19-yl]-25-(4-methylphenyl)spiro[11-thia-25-azahexacyclo[12.11.0.03,12.05,10.015,24.016,21]pentacosa-1,3(12),5,7,9,13,15(24),16,18,20,22-undecaene-4,9'-fluorene] The above is the IUPAC name of a molecule. Write its molecular formula.
user
C99H60N4S2
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