You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9,10-dihydroanthracene-9-carbonitrile;9,10-dihydroanthracene-9-carboxamide;ethyl 2-(9-cyano-10H-anthracen-9-yl)acetate;spiro[9H-anthracene-10,3'-pyrrolidine];spiro[9H-anthracene-10,4'-pyrrolidine]-2'-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C83H73N5O4
assistant