You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-[2,3-bis(ethenyl)-4-phenylphenyl]-3,4-bis(ethenyl)-2,9,9-trimethylfluorene;(3Z)-3-but-3-en-2-ylidene-2-methylidene-1-benzofuran;toluene The above is the IUPAC name of a molecule. Write its molecular formula.
user
C56H52O
assistant