You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-dibenzothiophen-1-yl-N-dibenzothiophen-4-yl-7,7-dimethylfluoreno[4,3-b][1]benzofuran-4-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C45H29NOS2
assistant