You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
10-phenyl-3-[7-[2-phenyl-6-(4-phenylphenyl)pyrimidin-4-yl]benzo[g]carbazol-8-yl]phenothiazine is the IUPAC name of a molecule. Please give its molecular formula.
user
C56H36N4S
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