You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1Z,3E,5Z)-7-[9,10-di(spiro[cyclopentane-1,9'-fluorene]-2'-yl)anthracen-2-yl]-3-ethylidene-7-imino-4-methylidenehepta-1,5-dien-1-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C58H50N2
assistant