You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-dibenzothiophen-1-yl-9-phenyl-N-spiro[benzo[a]phenalene-7,9'-thioxanthene]-3'-ylcarbazol-3-amine into its molecular formula.
user
C59H36N2S2
assistant