You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-3-[5-[5-[1-[5-(4-carbazol-9-ylphenyl)thiophen-2-yl]-2,5-bis(2-ethylhexyl)-3,6-dioxopyrrolo[3,4-c]pyrrol-4-yl]thiophen-2-yl]thiophen-2-yl]-2-cyanoprop-2-enoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C56H54N4O4S3
assistant