You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-N,11-N-di(dibenzofuran-3-yl)-5-N,11-N-dinaphthalen-2-yl-8-oxa-3,4,6,12,13-pentazatricyclo[7.4.0.02,7]trideca-1(13),2(7),3,5,9,11-hexaene-5,11-diamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C51H29N7O3
assistant