You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9-[2-[6-[2-(1,2,4a,5,6,9a-hexahydrocarbazol-9-yl)-3-[(1E,3Z)-penta-1,3-dienyl]phenyl]-1-methyl-2-phenyl-2H-1,3,5-triazin-4-yl]-6-pyridin-2-ylphenyl]-4a-methyl-2,9a-dihydro-1H-carbazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C57H54N6
assistant