You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2E)-2-[[4-(14-azatetracyclo[13.4.0.02,7.08,13]nonadeca-1(19),2,4,6,8,10,12,15,17-nonaen-14-yl)phenyl]methylidene]-5-naphthalen-1-ylindene-1,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C44H27NO2
assistant