You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[9-[3-[(1Z)-buta-1,3-dienyl]-2-methyl-1-phenylindol-5-yl]dibenzothiophen-2-yl]-9-(4,6-diphenylpyrimidin-2-yl)carbazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C59H40N4S
assistant