You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[(9Z)-19-methylidene-6-azatetracyclo[8.7.2.05,18.012,17]nonadeca-1(18),2,4,9,12,14,16-heptaen-6-yl]-1-N,1-N,3-N,3-N-tetraphenylbenzene-1,3-diamine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C49H39N3
assistant