You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-naphtho[1,2-b][1]benzothiol-7-yl-5-phenyl-N-(4-phenylphenyl)benzo[b]carbazol-1-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C50H32N2S
assistant